WM_NCPAINT
An
application sends the WM_NCPAINT message to a window when its frame must be
painted.
WM_NCPAINT
hrgn = (HRGN) wParam; // handle of update region
Parameters
hrgn
Value of wParam.
Identifies the update region of the window. The update region is clipped to the
window frame.
Return Values
An
application should return zero if it processes this message.
Remarks
The DefWindowProc
function paints the window frame.
An
application can intercept this message and paint its own custom window frame.
The clipping region for a window is always rectangular, even if the shape of
the frame is altered.
See Also