Question

I have a dll in vc++ 9.0 Now I have to call the function of this dll in our c# application,but the problem is that we have to use .def file to export the functions.

EXPORTS
Abc           @1  NONAME
Xyz            @2 NONAME

We have to use only ordinal no of the function in c# aplication.

Answer 1

When you specify the DllImport attribute, you can specify the Ordinal of the function:

 [DllImport("dllname", EntryPoint="#123")]
 static extern int MyFunc(int i);

then you call MyFunc to call the ordinal 123.