Adding Palette Message Handlers

The following example illustrates simple message handlers for the WM_PALETTECHANGED and WM_QUERYNEWPALETTE messages. The example uses the DrawDibRealize function to process the WM_QUERYNEWPALETTE message.

Your application should respond to the WM_QUERYNEWPALETTE message by invalidating the destination window to let the DrawDibDraw function redraw an image. You should respond to the WM_PALETTECHANGED message by using the DrawDibRealize function to realize the palette.

case WM_PALETTECHANGED:

if ((HWND)wParam == hwnd)

break;

case WM_QUERYNEWPALETTE:

hdc = GetDC(hwnd);

f = DrawDibRealize(hdd, hdc, FALSE) > 0;

ReleaseDC(hwnd, hdc);

if (f)

InvalidateRect(hwnd, NULL, TRUE);

break;

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