WM_CHANGECBCHAIN Overview  Group

The WM_CHANGECBCHAIN message is sent to the first window in the clipboard viewer chain when a window is being removed from the chain.

WM_CHANGECBCHAIN 

hwndRemove = (HWND) wParam;     // handle of window being removed 

hwndNext = (HWND) lParam;       // handle of next window in chain 

 

Parameters

hwndRemove

Value of wParam. Identifies the window being removed from the clipboard viewer chain.

hwndNext

Value of lParam. Identifies the next window in the chain following the window being removed. This parameter is NULL if the window being removed is the last window in the chain.

Return Values

If an application processes this message, it should return zero.

Remarks

Each clipboard viewer window saves the handle of the next window in the clipboard viewer chain. Initially, this handle is the return value of the SetClipboardViewer function.

When a clipboard viewer window receives the WM_CHANGECBCHAIN message, it should call the SendMessage function to pass the message to the next window in the chain, unless the next window is the window being removed. In this case, the clipboard viewer should save the handle specified by hwndNext as the next window in the chain.

See Also

SendMessage, SetClipboardViewer