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Adding an Event to ActiveX control created from DLL

Posted on 2004-10-04
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Last Modified: 2010-04-05
I need to know how to add an Event to an ActiveX control I imported from a type library (DLL).  As I received it, the control works fine but only fires a few Drag Events, OnEnter and OnExit.  Before posting here I searched on the forums, but all the answers I could find assume I am creating an ActiveX control or Active Form from scratch, but I am using a DLL compiled in C++ that does not fire the events I want.  I need to be able to track the mouse position inside this control.  An example of how to add OnClick or Mousedown to such an ActiveX control would be very helpful.

Also any other workaround to track mouse position and clicks inside an ActiveX container would be sufficient.

Thanks!
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Question by:whfolsom4
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Wim ten Brink earned 375 total points
ID: 12225281
If it doesn't fire the events you want, then you're out of luck. It's the C++ code that will have to shoot those events in the first place. If it doesn't, well... Tough!

To track the mouse events, you might use the OnMouseMove events of the control below the ActiveX control. If not, you'll have to install a mousehook message handler. Not a pretty solution, though.
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by:whfolsom4
ID: 12227094
Thanks, I did end up installing a mousehook message handler in the form of TApplicationEvents component.  Otherwise, it looks like the parent control receives no events when the mouse if over the ActiveX control.
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