WM_PALETTECHANGED

The WM_PALETTECHANGED message is sent to all top-level and overlapped windows after the window with the keyboard focus has realized its logical palette, thereby changing the system palette. This message enables a window that uses a color palette but does not have the keyboard focus to realize its logical palette and update its client area.

WM_PALETTECHANGED 
hwndPalChg = (HWND) wParam; // handle of window that changed palette 
 

Parameters

hwndPalChg

Value of wParam. Handle to the window that caused the system palette to change.

Remarks

This message must be sent to all top-level and overlapped windows, including the one that changed the system palette. If any child windows use a color palette, this message must be passed on to them as well.

To avoid creating an infinite loop, a window that receives this message must not realize its palette, unless it determines that wParam does not contain its own window handle.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in winuser.h.

See Also

Colors Overview, Color Messages, WM_PALETTEISCHANGING, WM_QUERYNEWPALETTE