This member function is called by the framework to update the status of the toolbar or status bar.
virtual void OnUpdateCmdUI(
CFrameWnd* pTarget,
BOOL bDisableIfNoHndler
) = 0;
Parameters
pTarget
Points to the main frame window of the application. This pointer is used for routing update messages.bDisableIfNoHndler
Flag that indicates whether a control that has no update handler should be automatically displayed as disabled.
Remarks
To update an individual button or pane, use the ON_UPDATE_COMMAND_UI macro in your message map to set an update handler appropriately. See ON_UPDATE_COMMAND_UI for more information about using this macro.
OnUpdateCmdUI is called by the framework when the application is idle. The frame window to be updated must be a child window, at least indirectly, of a visible frame window. OnUpdateCmdUI is an advanced overridable.
Requirements
Header: afxext.h