When trying to run several VB3 apps after installation my VB4 application
with Setupkit 16 bit, the programs complain about DLL error.

I wonder if Setupkit replaces any files or what happens.

I don't use any VBX in my app that the 3.0 app uses.
The only DLL that is specific for my app is APIGUIDE.DLL which I
assume the VB3 apps don't use.