Rgn is usually _WinAPI_CreateRectRgn() (or CreateRoundRectRgn), but somehow SysDateTimePick32 doesnt want to play along, also behaves weird like it's drawn from bottom up, as in X,Y pos is not the top left corner but the lower left corner.
Rgn works fine with SetWindowRgn but not with InvertRgn...
#Region DATE
$hRgn = _WinAPI_CreateRectRgn(5, 300, 210, 330)
_WinAPI_SetWindowRgn($hGui, $hRgn)
;~ _WinAPI_InvertRgn ($hGUI, $hRgn) ; <-- doesnt want to play along for some reason
GUICtrlCreateDate("", 5, 280, 200, 20)
#EndRegion DATE