. Net project reference ActiveX Control notes

If you open a project that originally referenced ActiveX control, an error is reported, prompting that axinterop is not referenced. xxxlib. DLL or InterOP. xxxlib. DLL, directly reference these files through the reference, or the same will report this error, Looking For A Long Time did not find the cause. Later, I was so angry that I decided to try again, but I found a solution at this time.

Solution:
First, register the ActiveX control.

Add the ActiveX to the toolbar first,

Open a form, add the control, and then delete it.

In this way, the system will automatically convert and reference related ActiveX functions.

Recompile the project.