"parameter not optional"?
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I add an interface to an OCX, when I use the OCX, it throw an exception and pop a message box "parameter not optional". Why? who can tell me reason? Thanks a lot!
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I add an interface to an OCX, when I use the OCX, it throw an exception and pop a message box "parameter not optional". Why? who can tell me reason? Thanks a lot!
Are you passing a VT_EMPTY or a VT_NULL? Well, you shouldn't :)
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I add an interface to an OCX, when I use the OCX, it throw an exception and pop a message box "parameter not optional". Why? who can tell me reason? Thanks a lot!
Just my 2 cents: On insertion your OCX maybe querying container for some ambient property not supported by your container. "...Ability to type is not enough to become a Programmer. Unless you type in VB. But then again you have to type really fast..." Me