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This message is sent when a pop-up menu is about to become active. This enables an application to modify the pop-up menu before it is displayed, without changing the entire menu.
WM_INITMENUPOPUP hmenuPopup= (HMENU) wParam; uPos= (UINT)LOWORD( lParam); fSystemMenu= (BOOL)HIWORD( lParam);
Parameters
- hmenuPopup
- Handle to the drop-down menu or submenu.
- uPos
- Value of the low-order word of lParam. Specifies the zero-based relative position of the menu item that opens the drop-down menu or submenu.
- fSystemMenu
- Value of the high-order word of
lParam. Boolean that specifies whether the drop-down menu is
the
windowmenu (also known as the
Systemmenu or the
Controlmenu). Set to TRUE if the menu is the
windowmenu, or to FALSE otherwise.
Return Values
An application should return zero if it processes this message.
Remarks
The fSystemMenuparameter is always FALSE.
Requirements
Runs on Versions Defined in Include Link to Windows CE OS 1.0 and later Winuser.h Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.