As the other answers have suggested, you're cleaarly doing something when updating the interface manually, so why not update the interface both manually AND by using the wizard, and seeing what the differences are between the IDL generated by the two mechanisms? That should help you realise what you're missing out... Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Clickety[^] --Mike--

Google for "Registration-Free COM" you will find lots of information, mostly by microsoft. The "trick" is done by using manifests and activation contexts. :)

I have the same problem, and I am not using MFC. From several partiotins that I have, the GetVolumeInformation failed 2x. Using the FormatMessage char *errorBuf = 0; if ( FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), //the error message MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language (LPTSTR) &errorBuf, 0, NULL) ) { MessageBox (NULL, errorBuf, "BuildIndex - Error",MB_OK); LocalFree (errorBuf); } The message box says "The filename, directory name, or volume label syntax is incorrect" But explorer shows the right label for those partitions.:confused: So It must be another way to collect information and getting the right label. ==== EDIT ==== Never mind, I got the answer. I added '\\' to the drive name. The funny thing was, It was successfully without adding the '\\' on some partitions :laugh:

Ok, i clicked on the link Thanks for remind me