In this example, the WinRealizePalette call is issued in response to a WM_REALIZEPALETTE. This ensures that the palette is appropriately realized for all drawing operations.

#define INCL_WIN
#include <OS2.H>
HWND hwnd;
ULONG cclr;
USHORT msg;
HPS hps;

switch(msg)
{
 case WM_REALIZEPALETTE:

 WinRealizePalette(hwnd,hps,&cclr);
}