WM_DRAWCLIPBOARD

The WM_DRAWCLIPBOARD message is sent to the first window in the clipboard viewer chain when the content of the clipboard changes. This enables a clipboard viewer window to display the new content of the clipboard.

A window receives this message through its WindowProc function.

LRESULT CALLBACK WindowProc(
  HWND hwnd,       // handle to window
  UINT uMsg,       // WM_DRAWCLIPBOARD
  WPARAM wParam,   // not used
  LPARAM lParam    // not used
);

Parameters

This message has no parameters.

Remarks

Only clipboard viewer windows receive this message. These are windows that have been added to the clipboard viewer chain by using the SetClipboardViewer function.

Each window that receives the WM_DRAWCLIPBOARD message must call the SendMessage function to pass the message on to the next window in the clipboard viewer chain. The handle to the next window in the chain is returned by SetClipboardViewer, and may change in response to a WM_CHANGECBCHAIN message.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Winuser.h; include Windows.h.

See Also

Clipboard Overview, Clipboard Messages, SendMessage, SetClipboardViewer, WM_CHANGECBCHAIN