WM_INITMENU

The WM_INITMENU message is sent when a menu is about to become active. It occurs when the user clicks an item on the menu bar or presses a menu key. This allows the application to modify the menu before it is displayed.

WM_INITMENU 
hmenuInit = (HMENU) wParam; // handle to menu to initialize 
 

Parameters

hmenuInit

Value of wParam. Handle to the menu to be initialized.

Return Values

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

Remarks

A WM_INITMENU message is sent only when a menu is first accessed; only one WM_INITMENU message is generated for each access. For example, moving the mouse across several menu items while holding down the button does not generate new messages. WM_INITMENU does not provide information about menu items.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in winuser.h.

See Also

Keyboard Accelerators Overview, Keyboard Accelerator Messages, WM_INITMENUPOPUP