WM_CTLCOLORLISTBOX

The WM_CTLCOLORLISTBOX message is sent to the parent window of a list box before the system draws the list box. By responding to this message, the parent window can set the text and background colors of the list box by using the given display device context handle.

WM_CTLCOLORLISTBOX 
hdcLB = (HDC) wParam;   // handle to list box display context 
hwndLB = (HWND) lParam; // handle to list box

Parameters

hdcLB: Value of wParam. Handle to the device context for the list box.
hwndLB: Value of lParam. Handle to the list box.

Return Values

If an application processes this message, it must return a handle to a brush. The system uses the brush to paint the background of the list box.

Default Action

The DefWindowProc function selects the default system colors for the list box.

Remarks

The system does not automatically destroy the returned brush. It is the application's responsibility to destroy the brush when it is no longer needed.

The WM_CTLCOLORLISTBOX message is never sent between threads. It is sent only within one thread.

If a dialog box procedure handles this message, it should cast the desired return value to a BOOL and return the value directly. If the dialog box procedure returns FALSE, then default message handling is performed. The DWL_MSGRESULT value set by the SetWindowLong function is ignored.

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