I recently made an application, packaged it up with the file distribution thing included with vb6, and sent it off to some friends...

For some friends, everything works fine, but for others, they get a "Class not registered" error...
What causes this? i've never had this problem on my machine...

and also, some of them get type mismatch errors when the program starts up, but others do not. I've never had any of these problems! Why are they showing up on other peoples computers??? Am i overlooking something obvious?