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WM_CONTEXTMENU Overview  Group

The WM_CONTEXTMENU message notifies a window that the user clicked the right mouse button (right clicked) in the window.

hwnd = (HWND) wParam; 

xPos = LOWORD(lParam); 

yPos = HIWORD(lParam); 

 

Parameters

hwnd
Handle to the window in which the user right clicked the mouse. This can be a child window of the window receiving the message. For more information about processing this message, see the Remarks section.
xPos 
Horizontal position of the cursor, in screen coordinates, at the time of the mouse click.
yPos
Vertical position of the cursor, in screen coordinates, at the time of the mouse click.

Return Values

No return value.

Remarks

A window can process this message by displaying a shortcut menu using the TrackPopupMenu or TrackPopupMenuEx function.

If a window does not display a shortcut menu it should pass this message to the DefWindowProc function. If a window is a child window, DefWindowProc sends the message to the parent. Otherwise, DefWindowProc displays a default shortcut menu if the specified position is in the window’s caption.

DefWindowProc generates the WM_CONTEXTMENU message when it processes the WM_RBUTTONUP or WM_NCRBUTTONUP message.

See Also

DefWindowProc, TrackPopupMenu, TrackPopupMenuEx, WM_NCRBUTTONUP, WM_RBUTTONUP 


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