Adds a menu item
void AddItem( const TCHAR* pszText, const TCHAR* pszMacro, const TCHAR* pszDescription = 0 );
The text of the new menu item, which may include an ampersand for a short-cut key.
To create a separator item, with no text, pass "-" as pszText.
The name of the macro function which will be called by the menu. This should be marked in the XLL+ Function Wizard as a macro function.
Optional description which will appear on the status bar in some versions of Excel.
Adds an item to the menu.
Unlike any of the other item methods, this function may be called either before or after Create() has been called.