Dynamically changing values in a Slate Widget

Hello,

I have a slate entry that looks roughly like this:

	+ SHorizontalBox::Slot()
		.AutoWidth()
		[
			SNew(SSpinBox<int>)
			.Value(((FMyEdMode*)GetEditorMode())->GetTool()->m_ChangingValue)
		]

The problem at hand is that it only displays the initial value. I want it to be reflecting the value as soon as it changes, a.k.a. “Immediate Mode”.

Is there any way around this?
I have tried to watch rudimentary tutorials but I haven’t seen them explain this (yet).

Cheers for any response!