Possible alternatives to ActiveX calls:
If you program can save the data to a file, then you could read the file from LabVIEW and act accordingly.
If the data is generated by a function that is in a .dll, you can make a call to the function from LabVIEW using the "Call Library Function".
If you have the code of your C++ program, maybe you can work a CIN that will work directly from LabVIEW.
There can be other alternatives.
Regards;
Enrique
www.vartortech.com