Functions on MouseDown Event

[jaydwest]

We like to hang functions on a Button_Click event. We would also like to use a function with the MouseDown event, but we have not been able how to use the Shift parameter in the function, e.g.

=MyFunction("Test", shift)

Is there any way to get access to the Shift parameter when using a function with the Button_MouseDown Event?

Thanks in advance for your help!