I created 5 custom pages.

While setup is in progress, two specific, custom pages
I want to change the x, y coordinates or size of a specific controller.

I tried the following but to no avail:

For example, change the y coordinate of the 1037 ID control from 15 to 20.

GetDlgItem $R0 $HWNDPARENT 1037
System::Call 'user32::MoveWindow(i$R0,i15,i20,i 280,i 18,i0)'