SOLUTION: ocx or one of its dependencies not correctly registered: a file is missing or invalid.

SOLUTION: ocx or one of its dependencies not correctly registered: a file is missing or invalid. 

Problem:

I used Windows 7 64-bit. I ran a program called Midimaker, and got the message:

"Comdlg32.ocx or one of its dependencies not correctly registered: a file is missing or invalid."

SOLUTION: 

I ran the program in Compatibility mode for Windows XP. It worked.