Calling methods of a class in a Win32 Dll

Hi With p/invoke, this is the only way. Maybe it is possible to create a wrapper with MCC. Instantiate unmanaged classes in managed code, is possible with COM interop. Cheers Simon

Thanks, simon. The problem is that Method1 is not an static method of the class Foo. I requiere to create an object of Foo in C# and then call Method1. The solution that you describe would be ok if Method1 were static. Thanks, anyway.

Hi It is possible to call unmanaged code from managed. But only with some bridging technologies. For example P/Invoke (as you already have mentioned) or creating some wrappers with managed c++. There is also a mechanism of interoperability between .net <-> com (unmanaged code also). **************** In your case, you have to export Method1 of the whatever.dll. Then you can use it with P/Invoke the following way (this is just one possiible way): public class Win32Wrapper { [DllImport("whatever.dll", CharSet=CharSet.Auto, SetLastError=true)] public static extern uint Method1(ushort messge, uint param); } public class MainClass { public static void Main(string[] args) { uint result = Win32Wrapper.Method1(2, 5); } } I hope, i helped a little bit. Cheers Simon

Somebody tell me that is impossible to make a call to a not managed methods of a class coded in C++. Away of how to make it, Does anybody know if at least is possible?