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WM_COMMAND (Compact 2013)

  • Article

3/28/2014

This message is sent when the user selects a command item from a menu, when a control sends a message to its parent window, or when an accelerator keystroke is translated.

Syntax

WM_COMMAND wNotifyCode = HIWORD(wParam); 
    wID = LOWORD(wParam); 
    hwndCtl = (HWND) lParam;

Parameters

  • wNotifyCode
    Value of the high-order word of wParam. Specifies the notification code if the message is from a control. If the message is from an accelerator, this parameter is 1. If the message is from a menu, this parameter is 0.
  • wID
    Value of the low-order word of wParam. Specifies the identifier of the menu item, control, or accelerator.
  • hwndCtl
    Handle to the control sending the message if the message is from a control. Otherwise, this parameter is NULL.

Return Value

An application should return zero if it processes this message.

Remarks

Accelerator keystrokes that select items from the window menu are translated into WM_SYSCOMMAND messages.

If an accelerator keystroke occurs that corresponds to a menu item when the window that owns the menu is minimized, no WM_COMMANDmessage is sent. However, if an accelerator keystroke occurs that does not match any of the items in the window's menu or in the window menu, a WM_COMMAND message is sent, even if the window is minimized.

If an application enables a menu separator, the system sends a WM_COMMAND message with the low-word of the wParam parameter set to zero when the user selects the separator.

Requirements

Header

winuser.h

See Also

Reference

Menu Messages
WM_SYSCOMMAND