Call unmanaged dll dynamically

Hello,

Maybe this article http://ift.tt/1ytvTlh is what you explained in your first example.

And to achieve what you need, you can refer to the following article:

http://ift.tt/1waKL9O

public  object DynamicDllFunctionInvoke( string DllPath, string EntryPoint ) 
  {
   // Version string definition
   byte[] verstr = new byte[1024];
   //Define return type of your dll function.
   Type returnType = typeof(int);        
   //out or in parameters of your function.   
   Type [] parameterTypes = {typeof(byte[])};
   object[] parameterValues = {verstr};
   string entryPoint = entrypoint;
              
   // Create a dynamic assembly and a dynamic module
   AssemblyName asmName = new AssemblyName();
   asmName.Name = "tempDll";
   AssemblyBuilder dynamicAsm = 
     AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, 
     AssemblyBuilderAccess.Run);
   ModuleBuilder dynamicMod = 
     dynamicAsm.DefineDynamicModule("tempModule");

   // Dynamically construct a global PInvoke signature 
   // using the input information
   MethodBuilder dynamicMethod = dynamicMod.DefinePInvokeMethod(
     entryPoint, DllPath, MethodAttributes.Static | MethodAttributes.Public
     | MethodAttributes.PinvokeImpl , CallingConventions.Standard,
     returnType, parameterTypes, CallingConvention.Winapi, 
     CharSet.Ansi);

   // This global method is now complete
   dynamicMod.CreateGlobalFunctions();

   // Get a MethodInfo for the PInvoke method
   MethodInfo mi = dynamicMod.GetMethod(EntryPoint);
   // Invoke the static method and return whatever it returns
   object retval = mi.Invoke(null, parameterValues);
   // Filled verstr paramter.
   MessageBox.Show(System.Text.ASCIIEncoding.ASCII.GetString(verstr));
   return retval;
  }

You may also want to know reflection by refer to the following article:

http://ift.tt/1kyQG30

Regards,

---

Barry

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