CFSTR_FILEDESCRIPTOR/CFSTR_FILECONTENTS 'Copying Files' Dialog missing

I have a namespace extension that supports copy-paste using the CFSTR_FILEDESCRIPTOR/ CFSTR_FILECONTENTS to copy virtual files to the clipboard. However, the 'Copying Files...' progress dialog does not show up.

Explorer appears to hang until the copy operation is complete.

Any suggestions as to ho开发者_开发技巧w to get the progress dialog to work?

Thanks, Mridul.

Well... that was a straight forward fix... Ensure that for the FILEDESCRIPTOR object, FILEDESCRIPTOR.dwFlags |= FD_PROGRESSUI;

Mridul.