.NET Security and Cryptography

Testing Your Cygwin Installation

You can now test your Cygwin installation by compiling a simple DLL with the gcc utility and calling it from a C# .NET program. Here is an example of how to do this.

Create the following C source code file named MyDll.c. This will be compiled with the gcc utility to create a Windows DLL.

//MyDll.c

#include <windows.h>

int WINAPI DllMain(
   HANDLE hInst,
   ULONG reason,
   LPVOID lpReserved)
{
   return 1;
}
__declspec(dllexport) char* SomeDllFunction()
{
   return "SomeDllFunction called!";
}

Here is the command line for compiling and generating MyDll.dll. This can be executed at an ordinary Windows command prompt or at the Cygwin Bash Shell prompt.

gcc -shared MyDll.c -o MyDll.dll -e DllMain@12

Here is the C# client program ...