while trying Siekmanski's GDIplus sample, https://masm32.com/board/index.php?topic=8483.msg92918#msg92918 (https://masm32.com/board/index.php?topic=8483.msg92918#msg92918)
found PixelFormat32bppRGB already defined as decimal number on line 25953 in windows.inc.
PixelFormat32bppRGB EQU 22009
shouldn't it be a hex number?
PixelFormat32bppRGB EQU 22009h
22009h is correct.