COM

ForNow wrote: I am getting all kinds of exceptions You really need to show the exceptions, rather than hoping people can guess what they are. Use the best guess

commented out #import Tnanks

venkatesh52867 wrote: dialog only not displaying . Well that's the second time you have told us that, but without a lot more information it's anyone's guess what is happening. Use the best guess

In short - I'm interested which interfaces are supported on CompressedFolder COM object. http://i47.tinypic.com/14m49xx.png You can use OLE/COM Object Viewer and post screenshot/write down interfaces.

Wrong forum. This is not for Hardware comms. Component Object Model (COM) "It's true that hard work never killed anyone. But I figure, why take the chance." - Ronald Reagan That's what machines are for. Got a problem? Sleep on it.

You are welcome - As I supposed, it came up with V4 of the .NET framework. Maybe earlier versions of the framework have added the reference by itself. cheers Marco Bertschi Software Developer & Founder SMGT Web-Portal CP Profile | Twitter | Facebook | SMGT Web-Portal FizzBuzz - Gary Wheeler

ForNow wrote: I think the string I am passing is being interpetted correctly By luck, not judgement; if your project is built in UNICODE mode then it will be wrong. You should not use a cast unless you understand the consequences. Instead, use the TEXT() macro to ensure that your character string is generated in the appropriate character set to match the build. Your cast in the foregoing code is telling the compiler to ignore the fact that the string may be in the wrong character set. Use the best guess

Then you either need to export it from the dll or provide a function that will return it to the calling application. Use the best guess

You should make an effort to research error codes first: see here[^] for a number of possibilities.

ForNow wrote: is this correct ? no ... you should use varfalse.vt = VT_EMPTY or varfalse.vt = VT_NULL

http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.workbooks.opentext(d=printer,v=office.11).aspx[^] When I orignally coded the app and used the #import method I didn't find which led me to use native OLE functions Then I got stuck with GetIDSofnames Now I found the api in my excel.h header must of overlooked thanks