ActiveX Syntax Tip

I wrote an ActiveX Control and when entering something like

MyActiveX.Initialise(MyString)

It came up with a Syntax ToolTip that told me the ActiveX Variable Name and the Data Type.

MY QUESTION IS:

Can you do something like what they did with the msgbox, showing the default information in the syntax tooltip. Also is is possible to display other information in this syntax tooltip.

Thanks in advance,
Steve.