Slate error

I am using the A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums as my entry point to slate.

I already have a HUD class which is drawing some canvas. I just added the extra code and I got a lot of errors.
I have added slate to project.build.cs
// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.

using UnrealBuildTool;

public class MyProject : ModuleRules
{
	public MyProject(TargetInfo Target)
	{
        //Folders to work with:
        PrivateIncludePaths.AddRange(new string[] {
            "MyProject/Projectiles",
            "MyProject"
        });
		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore" });

        PrivateDependencyModuleNames.Add("Slate");
	}
}

My errors…

1>------ Build started: Project: MyProject, Configuration: Development_Editor x64 ------
1>  Building UnrealHeaderTool...
1>  Target is up to date.
1>  Parsing headers for MyProjectEditor
1>  Code generation finished for MyProjectEditor and took 6.321
1>  Performing 1 actions (max 2 parallel jobs)
1>  [1/1] link.exe UE4Editor-MyProject.dll
1>     Creating library D:\ue4\New folder\MyProject\Intermediate\Build\Win64\MyProjectEditor\Development\UE4Editor-MyProject.lib and object D:\ue4\New folder\MyProject\Intermediate\Build\Win64\MyProjectEditor\Development\UE4Editor-MyProject.exp
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) private: static void * __cdecl FSlateControlledConstruction::operator new(unsigned __int64)" (__imp_??2FSlateControlledConstruction@@CAPEAX_K@Z) referenced in function "public: static class TSharedRef<class SMyUIWidget,0> __cdecl TWidgetAllocator<class SMyUIWidget,0>::PrivateAllocateWidget(void)" (?PrivateAllocateWidget@?$TWidgetAllocator@VSMyUIWidget@@$0A@@@SA?AV?$TSharedRef@VSMyUIWidget@@$0A@@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) private: static void * __cdecl FSlateControlledConstruction::operator new(unsigned __int64)" (__imp_??2FSlateControlledConstruction@@CAPEAX_K@Z)
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static void __cdecl FSlateControlledConstruction::operator delete(void *)" (__imp_??3FSlateControlledConstruction@@SAXPEAX@Z) referenced in function "public: virtual void * __cdecl SMyUIWidget::`scalar deleting destructor'(unsigned int)" (??_GSMyUIWidget@@UEAAPEAXI@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static void __cdecl FSlateControlledConstruction::operator delete(void *)" (__imp_??3FSlateControlledConstruction@@SAXPEAX@Z)
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl SWidget::SWidgetConstruct(class TAttribute<class FString> const &,class TSharedPtr<class IToolTip,0> const &,class TAttribute<struct TOptional<enum EMouseCursor::Type> > const &,class TAttribute<bool> const &,class TAttribute<struct EVisibility> const &,class FName const &)" (__imp_?SWidgetConstruct@SWidget@@QEAAXAEBV?$TAttribute@VFString@@@@AEBV?$TSharedPtr@VIToolTip@@$0A@@@AEBV?$TAttribute@U?$TOptional@W4Type@EMouseCursor@@@@@@AEBV?$TAttribute@_N@@AEBV?$TAttribute@UEVisibility@@@@AEBVFName@@@Z) referenced in function "public: class TSharedRef<class SMyUIWidget,0> __cdecl TDecl<class SMyUIWidget,struct RequiredArgs::T0RequiredArgs>::operator<<=(struct SMyUIWidget::FArguments const &)const " (??_3?$TDecl@VSMyUIWidget@@UT0RequiredArgs@RequiredArgs@@@@QEBA?AV?$TSharedRef@VSMyUIWidget@@$0A@@@AEBUFArguments@SMyUIWidget@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __cdecl SWidget::SWidgetConstruct(class TAttribute<class FString> const &,class TSharedPtr<class IToolTip,0> const &,class TAttribute<struct TOptional<enum EMouseCursor::Type> > const &,class TAttribute<bool> const &,class TAttribute<struct EVisibility> const &,class FName const &)" (__imp_?SWidgetConstruct@SWidget@@QEAAXAEBV?$TAttribute@VFString@@@@AEBV?$TSharedPtr@VIToolTip@@$0A@@@AEBV?$TAttribute@U?$TOptional@W4Type@EMouseCursor@@@@@@AEBV?$TAttribute@_N@@AEBV?$TAttribute@UEVisibility@@@@AEBVFName@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl SWidget::SetVisibility(class TAttribute<struct EVisibility>)" (__imp_?SetVisibility@SWidget@@QEAAXV?$TAttribute@UEVisibility@@@@@Z) referenced in function "public: virtual void __cdecl AMyProjectHUD::BeginPlay(void)" (?BeginPlay@AMyProjectHUD@@UEAAXXZ)
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl SWidget::SetDebugInfo(char const *,char const *,int)" (__imp_?SetDebugInfo@SWidget@@QEAAXPEBD0H@Z) referenced in function "struct TDecl<class SMyUIWidget,struct RequiredArgs::T0RequiredArgs> __cdecl MakeTDecl<class SMyUIWidget,struct RequiredArgs::T0RequiredArgs>(char const *,char const *,int,struct RequiredArgs::T0RequiredArgs const &)" (??$MakeTDecl@VSMyUIWidget@@UT0RequiredArgs@RequiredArgs@@@@YA?AU?$TDecl@VSMyUIWidget@@UT0RequiredArgs@RequiredArgs@@@@PEBD0HAEBUT0RequiredArgs@RequiredArgs@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __cdecl SWidget::SetDebugInfo(char const *,char const *,int)" (__imp_?SetDebugInfo@SWidget@@QEAAXPEBD0H@Z)
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) protected: __cdecl SCompoundWidget::SCompoundWidget(void)" (__imp_??0SCompoundWidget@@IEAA@XZ) referenced in function "public: __cdecl SMyUIWidget::SMyUIWidget(void)" (??0SMyUIWidget@@QEAA@XZ)
1>MyProjectHUD.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __cdecl SCompoundWidget::~SCompoundWidget(void)" (__imp_??1SCompoundWidget@@UEAA@XZ) referenced in function "public: virtual __cdecl SMyUIWidget::~SMyUIWidget(void)" (??1SMyUIWidget@@UEAA@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SCompoundWidget::ArrangeChildren(class FGeometry const &,class FArrangedChildren &)const " (?ArrangeChildren@SCompoundWidget@@UEBAXAEBVFGeometry@@AEAVFArrangedChildren@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "protected: virtual void __cdecl SWidget::CacheDesiredSize(void)" (?CacheDesiredSize@SWidget@@MEAAXXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "protected: virtual void __cdecl SWidget::CacheDesiredSize(void)" (?CacheDesiredSize@SWidget@@MEAAXXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual struct FVector2D __cdecl SCompoundWidget::ComputeDesiredSize(void)const " (?ComputeDesiredSize@SCompoundWidget@@UEBA?AUFVector2D@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FChildren * __cdecl SCompoundWidget::GetChildren(void)" (?GetChildren@SCompoundWidget@@UEAAPEAVFChildren@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FString __cdecl SWidget::GetCreatedInFile(void)const " (?GetCreatedInFile@SWidget@@UEBA?AVFString@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FString __cdecl SWidget::GetCreatedInFile(void)const " (?GetCreatedInFile@SWidget@@UEBA?AVFString@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual int __cdecl SWidget::GetCreatedInLineNumber(void)const " (?GetCreatedInLineNumber@SWidget@@UEBAHXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual int __cdecl SWidget::GetCreatedInLineNumber(void)const " (?GetCreatedInLineNumber@SWidget@@UEBAHXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual struct FSlateColor __cdecl SCompoundWidget::GetForegroundColor(void)const " (?GetForegroundColor@SCompoundWidget@@UEBA?AUFSlateColor@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual struct FSlateColor __cdecl SWidget::GetForegroundColor(void)const " (?GetForegroundColor@SWidget@@UEBA?AUFSlateColor@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual struct FSlateColor __cdecl SWidget::GetForegroundColor(void)const " (?GetForegroundColor@SWidget@@UEBA?AUFSlateColor@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FString __cdecl SWidget::GetReadableLocation(void)const " (?GetReadableLocation@SWidget@@UEBA?AVFString@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FString __cdecl SWidget::GetReadableLocation(void)const " (?GetReadableLocation@SWidget@@UEBA?AVFString@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class TSharedPtr<class IToolTip,0> __cdecl SWidget::GetToolTip(void)" (?GetToolTip@SWidget@@UEAA?AV?$TSharedPtr@VIToolTip@@$0A@@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class TSharedPtr<class IToolTip,0> __cdecl SWidget::GetToolTip(void)" (?GetToolTip@SWidget@@UEAA?AV?$TSharedPtr@VIToolTip@@$0A@@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual enum EWindowZone::Type __cdecl SWidget::GetWindowZoneOverride(void)const " (?GetWindowZoneOverride@SWidget@@UEBA?AW4Type@EWindowZone@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual enum EWindowZone::Type __cdecl SWidget::GetWindowZoneOverride(void)const " (?GetWindowZoneOverride@SWidget@@UEBA?AW4Type@EWindowZone@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::HasKeyboardFocus(void)const " (?HasKeyboardFocus@SWidget@@UEBA_NXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::HasKeyboardFocus(void)const " (?HasKeyboardFocus@SWidget@@UEBA_NXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::IsHovered(void)const " (?IsHovered@SWidget@@UEBA_NXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::IsHovered(void)const " (?IsHovered@SWidget@@UEBA_NXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnControllerAnalogValueChanged(class FGeometry const &,class FControllerEvent const &)" (?OnControllerAnalogValueChanged@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFControllerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnControllerAnalogValueChanged(class FGeometry const &,class FControllerEvent const &)" (?OnControllerAnalogValueChanged@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFControllerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnControllerButtonPressed(class FGeometry const &,class FControllerEvent const &)" (?OnControllerButtonPressed@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFControllerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnControllerButtonPressed(class FGeometry const &,class FControllerEvent const &)" (?OnControllerButtonPressed@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFControllerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnControllerButtonReleased(class FGeometry const &,class FControllerEvent const &)" (?OnControllerButtonReleased@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFControllerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnControllerButtonReleased(class FGeometry const &,class FControllerEvent const &)" (?OnControllerButtonReleased@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFControllerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FCursorReply __cdecl SWidget::OnCursorQuery(class FGeometry const &,class FPointerEvent const &)const " (?OnCursorQuery@SWidget@@UEBA?AVFCursorReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FCursorReply __cdecl SWidget::OnCursorQuery(class FGeometry const &,class FPointerEvent const &)const " (?OnCursorQuery@SWidget@@UEBA?AVFCursorReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnDragDetected(class FGeometry const &,class FPointerEvent const &)" (?OnDragDetected@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnDragDetected(class FGeometry const &,class FPointerEvent const &)" (?OnDragDetected@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnDragEnter(class FGeometry const &,class FDragDropEvent const &)" (?OnDragEnter@SWidget@@UEAAXAEBVFGeometry@@AEBVFDragDropEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnDragEnter(class FGeometry const &,class FDragDropEvent const &)" (?OnDragEnter@SWidget@@UEAAXAEBVFGeometry@@AEBVFDragDropEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnDragLeave(class FDragDropEvent const &)" (?OnDragLeave@SWidget@@UEAAXAEBVFDragDropEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnDragLeave(class FDragDropEvent const &)" (?OnDragLeave@SWidget@@UEAAXAEBVFDragDropEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnDragOver(class FGeometry const &,class FDragDropEvent const &)" (?OnDragOver@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFDragDropEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnDragOver(class FGeometry const &,class FDragDropEvent const &)" (?OnDragOver@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFDragDropEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnDrop(class FGeometry const &,class FDragDropEvent const &)" (?OnDrop@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFDragDropEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnDrop(class FGeometry const &,class FDragDropEvent const &)" (?OnDrop@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFDragDropEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::OnHitTest(class FGeometry const &,struct FVector2D)" (?OnHitTest@SWidget@@UEAA_NAEBVFGeometry@@UFVector2D@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::OnHitTest(class FGeometry const &,struct FVector2D)" (?OnHitTest@SWidget@@UEAA_NAEBVFGeometry@@UFVector2D@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyChar(class FGeometry const &,class FCharacterEvent const &)" (?OnKeyChar@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFCharacterEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyChar(class FGeometry const &,class FCharacterEvent const &)" (?OnKeyChar@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFCharacterEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyDown(class FGeometry const &,class FKeyboardEvent const &)" (?OnKeyDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyDown(class FGeometry const &,class FKeyboardEvent const &)" (?OnKeyDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyUp(class FGeometry const &,class FKeyboardEvent const &)" (?OnKeyUp@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyUp(class FGeometry const &,class FKeyboardEvent const &)" (?OnKeyUp@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnKeyboardFocusChanging(class FWeakWidgetPath const &,class FWidgetPath const &)" (?OnKeyboardFocusChanging@SWidget@@UEAAXAEBVFWeakWidgetPath@@AEBVFWidgetPath@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnKeyboardFocusChanging(class FWeakWidgetPath const &,class FWidgetPath const &)" (?OnKeyboardFocusChanging@SWidget@@UEAAXAEBVFWeakWidgetPath@@AEBVFWidgetPath@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnKeyboardFocusLost(class FKeyboardFocusEvent const &)" (?OnKeyboardFocusLost@SWidget@@UEAAXAEBVFKeyboardFocusEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnKeyboardFocusLost(class FKeyboardFocusEvent const &)" (?OnKeyboardFocusLost@SWidget@@UEAAXAEBVFKeyboardFocusEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyboardFocusReceived(class FGeometry const &,class FKeyboardFocusEvent const &)" (?OnKeyboardFocusReceived@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardFocusEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnKeyboardFocusReceived(class FGeometry const &,class FKeyboardFocusEvent const &)" (?OnKeyboardFocusReceived@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardFocusEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMotionDetected(class FGeometry const &,class FMotionEvent const &)" (?OnMotionDetected@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFMotionEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMotionDetected(class FGeometry const &,class FMotionEvent const &)" (?OnMotionDetected@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFMotionEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseButtonDoubleClick(class FGeometry const &,class FPointerEvent const &)" (?OnMouseButtonDoubleClick@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseButtonDoubleClick(class FGeometry const &,class FPointerEvent const &)" (?OnMouseButtonDoubleClick@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseButtonDown(class FGeometry const &,class FPointerEvent const &)" (?OnMouseButtonDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseButtonDown(class FGeometry const &,class FPointerEvent const &)" (?OnMouseButtonDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseButtonUp(class FGeometry const &,class FPointerEvent const &)" (?OnMouseButtonUp@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseButtonUp(class FGeometry const &,class FPointerEvent const &)" (?OnMouseButtonUp@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnMouseCaptureLost(void)" (?OnMouseCaptureLost@SWidget@@UEAAXXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnMouseCaptureLost(void)" (?OnMouseCaptureLost@SWidget@@UEAAXXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnMouseEnter(class FGeometry const &,class FPointerEvent const &)" (?OnMouseEnter@SWidget@@UEAAXAEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnMouseEnter(class FGeometry const &,class FPointerEvent const &)" (?OnMouseEnter@SWidget@@UEAAXAEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnMouseLeave(class FPointerEvent const &)" (?OnMouseLeave@SWidget@@UEAAXAEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnMouseLeave(class FPointerEvent const &)" (?OnMouseLeave@SWidget@@UEAAXAEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseMove(class FGeometry const &,class FPointerEvent const &)" (?OnMouseMove@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseMove(class FGeometry const &,class FPointerEvent const &)" (?OnMouseMove@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseWheel(class FGeometry const &,class FPointerEvent const &)" (?OnMouseWheel@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnMouseWheel(class FGeometry const &,class FPointerEvent const &)" (?OnMouseWheel@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual int __cdecl SCompoundWidget::OnPaint(class FGeometry const &,class FSlateRect const &,class FSlateWindowElementList &,int,class FWidgetStyle const &,bool)const " (?OnPaint@SCompoundWidget@@UEBAHAEBVFGeometry@@AEBVFSlateRect@@AEAVFSlateWindowElementList@@HAEBVFWidgetStyle@@_N@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnPreviewKeyDown(class FGeometry const &,class FKeyboardEvent const &)" (?OnPreviewKeyDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnPreviewKeyDown(class FGeometry const &,class FKeyboardEvent const &)" (?OnPreviewKeyDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFKeyboardEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnPreviewMouseButtonDown(class FGeometry const &,class FPointerEvent const &)" (?OnPreviewMouseButtonDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnPreviewMouseButtonDown(class FGeometry const &,class FPointerEvent const &)" (?OnPreviewMouseButtonDown@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnToolTipClosing(void)" (?OnToolTipClosing@SWidget@@UEAAXXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::OnToolTipClosing(void)" (?OnToolTipClosing@SWidget@@UEAAXXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchEnded(class FGeometry const &,class FPointerEvent const &)" (?OnTouchEnded@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchEnded(class FGeometry const &,class FPointerEvent const &)" (?OnTouchEnded@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchGesture(class FGeometry const &,class FPointerEvent const &)" (?OnTouchGesture@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchGesture(class FGeometry const &,class FPointerEvent const &)" (?OnTouchGesture@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchMoved(class FGeometry const &,class FPointerEvent const &)" (?OnTouchMoved@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchMoved(class FGeometry const &,class FPointerEvent const &)" (?OnTouchMoved@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchStarted(class FGeometry const &,class FPointerEvent const &)" (?OnTouchStarted@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FReply __cdecl SWidget::OnTouchStarted(class FGeometry const &,class FPointerEvent const &)" (?OnTouchStarted@SWidget@@UEAA?AVFReply@@AEBVFGeometry@@AEBVFPointerEvent@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::OnVisualizeTooltip(class TSharedPtr<class SWidget,0> const &)" (?OnVisualizeTooltip@SWidget@@UEAA_NAEBV?$TSharedPtr@VSWidget@@$0A@@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::OnVisualizeTooltip(class TSharedPtr<class SWidget,0> const &)" (?OnVisualizeTooltip@SWidget@@UEAA_NAEBV?$TSharedPtr@VSWidget@@$0A@@@@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::SupportsKeyboardFocus(void)const " (?SupportsKeyboardFocus@SWidget@@UEBA_NXZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual bool __cdecl SWidget::SupportsKeyboardFocus(void)const " (?SupportsKeyboardFocus@SWidget@@UEBA_NXZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::Tick(class FGeometry const &,double,float)" (?Tick@SWidget@@UEAAXAEBVFGeometry@@NM@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SWidget::Tick(class FGeometry const &,double,float)" (?Tick@SWidget@@UEAAXAEBVFGeometry@@NM@Z)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FString __cdecl SWidget::ToString(void)const " (?ToString@SWidget@@UEBA?AVFString@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FString __cdecl SWidget::ToString(void)const " (?ToString@SWidget@@UEBA?AVFString@@XZ)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static struct EVisibility const EVisibility::Visible" (__imp_?Visible@EVisibility@@2U1@B)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static struct EVisibility const EVisibility::Visible" (__imp_?Visible@EVisibility@@2U1@B)
1>MyProjectHUD.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static struct EVisibility const EVisibility::SelfHitTestInvisible" (__imp_?SelfHitTestInvisible@EVisibility@@2U1@B)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static struct EVisibility const EVisibility::SelfHitTestInvisible" (__imp_?SelfHitTestInvisible@EVisibility@@2U1@B)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class FSimpleSlot & __cdecl TSupportsOneChildMixin<class SWidget,class FSimpleSlot>::operator[](class TSharedRef<class SWidget,0>)" (__imp_??A?$TSupportsOneChildMixin@VSWidget@@VFSimpleSlot@@@@QEAAAEAVFSimpleSlot@@V?$TSharedRef@VSWidget@@$0A@@@@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class FSimpleSlot & __cdecl TSupportsContentAlignmentMixin<class FSimpleSlot>::HAlign(enum EHorizontalAlignment)" (__imp_?HAlign@?$TSupportsContentAlignmentMixin@VFSimpleSlot@@@@QEAAAEAVFSimpleSlot@@W4EHorizontalAlignment@@@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class FSimpleSlot & __cdecl TSupportsContentAlignmentMixin<class FSimpleSlot>::VAlign(enum EVerticalAlignment)" (__imp_?VAlign@?$TSupportsContentAlignmentMixin@VFSimpleSlot@@@@QEAAAEAVFSimpleSlot@@W4EVerticalAlignment@@@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl FSlateFontInfo::FSlateFontInfo(void)" (__imp_??0FSlateFontInfo@@QEAA@XZ) referenced in function "public: __cdecl TAttribute<struct FSlateFontInfo>::TAttribute<struct FSlateFontInfo>(void)" (??0?$TAttribute@UFSlateFontInfo@@@@QEAA@XZ)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl FSlateFontInfo::FSlateFontInfo(char const *,unsigned short)" (__imp_??0FSlateFontInfo@@QEAA@PEBDG@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static class FName __cdecl ISlateStyle::Join(class FName,char const *)" (__imp_?Join@ISlateStyle@@SA?AVFName@@V2@PEBD@Z) referenced in function "public: struct FTextBlockStyle const & __cdecl ISlateStyle::GetWidgetStyle<struct FTextBlockStyle>(class FName,char const *)const " (??$GetWidgetStyle@UFTextBlockStyle@@@ISlateStyle@@QEBAAEBUFTextBlockStyle@@VFName@@PEBD@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class SOverlay::FOverlaySlot & __cdecl TSupportsOneChildMixin<class SWidget,class SOverlay::FOverlaySlot>::operator[](class TSharedRef<class SWidget,0>)" (__imp_??A?$TSupportsOneChildMixin@VSWidget@@VFOverlaySlot@SOverlay@@@@QEAAAEAVFOverlaySlot@SOverlay@@V?$TSharedRef@VSWidget@@$0A@@@@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class SOverlay::FOverlaySlot & __cdecl SOverlay::FOverlaySlot::HAlign(enum EHorizontalAlignment)" (__imp_?HAlign@FOverlaySlot@SOverlay@@QEAAAEAV12@W4EHorizontalAlignment@@@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class SOverlay::FOverlaySlot & __cdecl SOverlay::FOverlaySlot::VAlign(enum EVerticalAlignment)" (__imp_?VAlign@FOverlaySlot@SOverlay@@QEAAAEAV12@W4EVerticalAlignment@@@Z) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __cdecl SOverlay::~SOverlay(void)" (__imp_??1SOverlay@@UEAA@XZ) referenced in function "public: virtual void * __cdecl SOverlay::`scalar deleting destructor'(unsigned int)" (??_GSOverlay@@UEAAPEAXI@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl SOverlay::Construct(struct SOverlay::FArguments const &)" (__imp_?Construct@SOverlay@@QEAAXAEBUFArguments@1@@Z) referenced in function "public: void __cdecl RequiredArgs::T0RequiredArgs::CallConstruct<class SOverlay,struct SOverlay::FArguments>(class TSharedRef<class SOverlay,0> const &,struct SOverlay::FArguments const &)const " (??$CallConstruct@VSOverlay@@UFArguments@1@@T0RequiredArgs@RequiredArgs@@QEBAXAEBV?$TSharedRef@VSOverlay@@$0A@@@AEBUFArguments@SOverlay@@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static class SOverlay::FOverlaySlot & __cdecl SOverlay::Slot(void)" (__imp_?Slot@SOverlay@@SAAEAVFOverlaySlot@1@XZ) referenced in function "public: void __cdecl SMyUIWidget::Construct(struct SMyUIWidget::FArguments const &)" (?Construct@SMyUIWidget@@QEAAXAEBUFArguments@1@@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl SOverlay::SOverlay(void)" (__imp_??0SOverlay@@QEAA@XZ) referenced in function "public: static class TSharedRef<class SOverlay,0> __cdecl TWidgetAllocator<class SOverlay,0>::PrivateAllocateWidget(void)" (?PrivateAllocateWidget@?$TWidgetAllocator@VSOverlay@@$0A@@@SA?AV?$TSharedRef@VSOverlay@@$0A@@@XZ)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static struct FTextBlockStyle const & __cdecl FTextBlockStyle::GetDefault(void)" (__imp_?GetDefault@FTextBlockStyle@@SAAEBU1@XZ) referenced in function "public: struct FTextBlockStyle const & __cdecl ISlateStyle::GetWidgetStyle<struct FTextBlockStyle>(class FName,char const *)const " (??$GetWidgetStyle@UFTextBlockStyle@@@ISlateStyle@@QEBAAEBUFTextBlockStyle@@VFName@@PEBD@Z)
1>MyUIWidget.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static class ISlateStyle const & __cdecl FCoreStyle::Get(void)" (__imp_?Get@FCoreStyle@@SAAEBVISlateStyle@@XZ) referenced in function "public: __cdecl STextBlock::FArguments::FArguments(void)" (??0FArguments@STextBlock@@QEAA@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SLeafWidget::ArrangeChildren(class FGeometry const &,class FArrangedChildren &)const " (?ArrangeChildren@SLeafWidget@@UEBAXAEBVFGeometry@@AEAVFArrangedChildren@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual void __cdecl SOverlay::ArrangeChildren(class FGeometry const &,class FArrangedChildren &)const " (?ArrangeChildren@SOverlay@@UEBAXAEBVFGeometry@@AEAVFArrangedChildren@@@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual struct FVector2D __cdecl SOverlay::ComputeDesiredSize(void)const " (?ComputeDesiredSize@SOverlay@@UEBA?AUFVector2D@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FChildren * __cdecl SLeafWidget::GetChildren(void)" (?GetChildren@SLeafWidget@@UEAAPEAVFChildren@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual class FChildren * __cdecl SOverlay::GetChildren(void)" (?GetChildren@SOverlay@@UEAAPEAVFChildren@@XZ)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "public: virtual int __cdecl SOverlay::OnPaint(class FGeometry const &,class FSlateRect const &,class FSlateWindowElementList &,int,class FWidgetStyle const &,bool)const " (?OnPaint@SOverlay@@UEBAHAEBVFGeometry@@AEBVFSlateRect@@AEAVFSlateWindowElementList@@HAEBVFWidgetStyle@@_N@Z)
1>MyUIWidget.cpp.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static class FName const FTextBlockStyle::TypeName" (__imp_?TypeName@FTextBlockStyle@@2VFName@@B)
1>D:\ue4\New folder\MyProject\Binaries\Win64\UE4Editor-MyProject.dll : fatal error LNK1120: 81 unresolved externals
1>  -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: D:\ue4\New folder\MyProject\Binaries\Win64\UE4Editor-MyProject.dll
1>  Cumulative action seconds (4 processors): 0.00 building projects, 0.00 compiling, 0.00 creating app bundles, 0.00 generating debug info, 0.26 linking, 0.00 other
1>  UBT execution time: 29.11 seconds
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets(38,5): error MSB3073: The command ""D:\Unreal Engine - 4\Engine\Build\BatchFiles\Build.bat" MyProjectEditor Win64 Development "D:\ue4\New folder\MyProject\MyProject.uproject"" exited with code -1.
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========

As of 4.2, you need a dependency on both the “Slate” and “SlateCore” modules.

i add SlateCore in MyProject.Build.cs
like this:

PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "OnlineSubsystem", "OnlineSubsystemUtils"});

    PrivateDependencyModuleNames.AddRange(new string[] { "Slate","SlateCore","InputCore", "ShooterGameLoadingScreen" });

u can try it.

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