Thans for the response.

I have tried many PCs without VB/VC installation and it works well.
Only one PC has such problem. I don't know why and how to work around it?

William

Windows manages access to COMDLG32.OCX very cleverly. Even if it exists,
it
may not be used. The version that can be used freely comes with VB6/Visual
Studio.
ALL the methods in this OCX can be replicated by Windows API calls
(available on all PCS) although this means more code.