Hello,
I am using a COM dll server (USBIO in attachment) from LABView. This is only a COM server and NOT an activeX control. I have successfully managed calling its methods and properties (with the activeX "Invoke node" and "Property node"). But now I have been trying to use its events call-back functions. I tried to "list events description" from the ActiveX menu. But this function doesn't list anything. I have found in the COM object source code that this happens because the events are accessible via another interface, which is in fact a DISPINTERFACE. When I force LABView to use this interface, I get the error "Object specified is not creatable "
Does normally the ActiveX "list events description" function suc
cess with a dll COM server ?
I know that this COM server can be accessed from Visual Basic (properties, methods, AND EVENTS). I have read in the forum that I probably have to write a wrapper dll to encapsulate the events call, or perhaps writing an activeX control in Visual Basic.
Do you know
- how difficult these are ?
- What are the principal steps to manage these ?
Thank you very much for your reading."
