Calling Unmanaged Dll's from Managed Code

Calling Unmanaged Dll's from Managed CodeThis is a very comprehensive Tutorial on the underlying PInvoke that is responsile for calling the C++ Dll's from the Code of C#.http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vcwlkplatforminvoketutorial.asp