How can i use windows api (SendMessage, FindWindow..)?

[wwbrother]

FIRST:
#include “Windows/AllowWindowsPlatformTypes.h”
#include
#include “Windows/HideWindowsPlatformTypes.h”

THEN:
SendMessageA(m_hCamMoudle, WM_CLOSE, 0, 0);
or
SendMessageW(m_hCamMoudle, WM_CLOSE, 0, 0);