Need help trying to create a ActiveX registered event

I am trying to create a register event for an ActiveX component. The problem I am having is creating the callback vi. When I right click on the VI ref and create the callback vi it is created with the user parameter as a variant. I would like this to be a control refnum. If I open the callback vi and replace the user parameter variant with a control refnum the wire from the callback vi to the VI ref is broken. How do I change the user parameter?

Joe is correct on this one. The callback where designed to take variants as their inputs, so that they are more flexible. In addition Variants are used through out ActiveX programming.
If you have a control reference that you want to pass into the VI, all you need to use is the "To Variant" function in the main VI to turn the reference into a variant. You can then inside the Callback VI you can use the Variant to Data VI to change the variant back to a reference; you simply where a constant of the reference type to the "Type" terminal.
Evan
National Instruments

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-- To post code, use the code button or type the code tags -- [code]CODE[/code] is displayed as CODE

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