Provides user Help for a command.
See IExchExtCommands : IUnknown.
HRESULT Help(
LPEXCHEXTCALLBACK lpeecb,
UINT cmdid
);
Microsoft Exchange calls the IExchExtCommands::Help method when the user requests Help on a command. If the extension object has added a menu, the cmdid parameter corresponding to that menu is the cmdid parameter of the first command on the menu minus one.
The extension object can provide Help for any command it implements or supersede Microsoft Exchange Help text for an existing command.