SetWindowRgn

Defines the visible region of a window or control.

Declaration

Source position: winapih.inc line 271

function SetWindowRgn(

hWnd: HWND;

hRgn: HRGN;

bRedraw: Boolean

This function sets the visible region of a window or control. It's parameters are:

hWnd: The handle of the window or control
hRgn: The handle to the region which contains the visible section of the window or control
bRedraw: True if the control or window should be repainted following the call of this function, False otherwise. See also the wiki documentation: Creating a Non-Rectangular Window or Control

TWinControl.SetShape		Specifies the non-rectangular shape of the widget.
LCLIntf.CreateRectRgn		Creates a rectangular region.