L_BM_INVERT

Send this message to invert the colors of an L_BITMAPCLASS window's bitmap.

Parameter

Meaning

wParam

Specifies whether the window should be redrawn to reflect the image changes. Use 1 to redraw the window, or 0 not to redraw it.

lParam

Reserved. Set to NULL.

Returns

SUCCESS

Function was successful.

< 0

An error occurred. Refer to Return Codes.