If you want to save yourself some grief and ditch the use of the OCX, you can download my freeware DynaZip class from UT Downloads. Then all you have to provide are the DLLs and the DZPROG32.exe [if you display the DZ progress bar].
The class is a non-visual PRG file that is heavily commented and comes with examples.
Mark McCasland
Midlothian, TX USA