Active X Programming Style

[TP Cytyc]

I"m writing a hardware driver using an Active X server. I'm looking for opinions on how, spefically, I should open and close the Active X sessions. Should it be open every time the driver is used, or should the higher level VI take care of opening and closing the session and just pass the reference into the driver?

[mfitzsimons]

I use ActiveX for my Video Capture application and I let the high level VI open the session once at the program start, pass the reference as the program is running, and close it at program completion.  Opening and closing it with each use seems to me to be a waste of CPU and doesn't serve any purpose.  The only time you may want to close it is to reinitialize the driver.

Matt

[TP Cytyc]

That makes sense. I guess I'll try that way.