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DFM_VALIDATECMD message

  • Article

Sent to verify the existence of a menu command.

DFM_INVOKECOMMAND

    wParam = (WPARAM)(WPARAM) idCmd;            

    lParam = (LPARAM)(LPARAM) lParam = 0;

Parameters

idCmd

The menu command identifier offset.

lParam

Not used. Must be zero.

Return value

Returns S_OK if the command exists, or S_FALSE otherwise.

Remarks

This message is sent to either the callback function or the callback object depending on how the default context menu object is constructed. There are two APIs for its construction, CDefFolderMenu_Create2, SHCreateDefaultContextMenu.

DFM_INVOKECOMMANDEX is an extended version of this message and provides more information to the callback. Use DFM_INVOKECOMMANDEX if the additional information provided by that interface is needed in your implementation.

Requirements

Requirement Value
Minimum supported client
 Windows Vista [desktop apps only]
Minimum supported server
 Windows Server 2008 [desktop apps only]
Header
Shlobj.h