DynamicWrapperCS.cs

using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime;
using System.Text;
using System.Runtime.InteropServices;
using System.EnterpriseServices;
using ComTypes = System.Runtime.InteropServices.ComTypes;
  
  
// Invoke a Win32 P/Invoke call.
// Based on work by Lee Holmes
// http://www.leeholmes.com/blog/2006/07/21/get-the-owner-of-a-process-in-powershell-pinvoke-and-refout-parameters
 
/*
Author: Casey Smith, Twitter: @subTee
License: BSD 3-Clause
Create Your Strong Name Key -> key.snk
$key = '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'
$Content = [System.Convert]::FromBase64String($key)
Set-Content key.snk -Value $Content -Encoding Byte
C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe /r:System.EnterpriseServices.dll /target:library /out:DynamicWrapperCS.dll /keyfile:key.snk DynamicWrapperCS.cs
C:\Windows\Microsoft.NET\Framework\v2.0.50727\regsvcs.exe DynamicWrapperCS.dll
 
 
// Requires Admin Rights to Register 
// C:\Windows\Microsoft.NET\Framework\v2.0.50727\regsvcs.exe DynamicWrapperCS.dll
*/
//https://www.add-in-express.com/creating-addins-blog/2011/12/20/type-name-system-comobject/ 
 
[ComVisible(true)]
[Guid("00000000-ACDC-FACE-9D8E-C0FFEEA5ACDC")]
[ClassInterface(ClassInterfaceType.AutoDispatch)]   
[ProgId("DynamicWrapperCS")]    
public class DynamicWrapperCS : ServicedComponent
{
     
    public DynamicWrapperCS() {} //Basic Constructor
     
    [ComVisible(true)]
    public Object Register(string dllName, string strReturnType,
    string methodName, string strInputParameterTypes,ref object objParameters)
    {
         
        //COM has no Type class, so do the necessary conversions
        Type returnType = Type.GetType(strReturnType);
        //Input Parameter Types
        int countOfInputParameters = (strInputParameterTypes.Length - 2);
        Type[] parameterTypes = new Type[countOfInputParameters];
        for(int i = 2, j = 0; i < strInputParameterTypes.Length; i++, j++)
        {
            parameterTypes[j] = ConvertStringNameToType(strInputParameterTypes[i]);
        }
         
         
         
        // Begin to build the dynamic assembly
        AppDomain domain = AppDomain.CurrentDomain;
        AssemblyName name = new System.Reflection.AssemblyName("PInvokeAssembly");
        AssemblyBuilder assembly = domain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run);
        ModuleBuilder module = assembly.DefineDynamicModule("PInvokeModule");
        TypeBuilder type = module.DefineType("PInvokeType", TypeAttributes.Public | TypeAttributes.BeforeFieldInit);
          
        // Define the actual P/Invoke method
        MethodBuilder method = type.DefineMethod(methodName, MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.Static | MethodAttributes.PinvokeImpl, returnType, parameterTypes);
          
        // Apply the P/Invoke constructor
        ConstructorInfo ctor = typeof (DllImportAttribute).GetConstructor (new Type [] { typeof (string) });
        CustomAttributeBuilder attr = new System.Reflection.Emit.CustomAttributeBuilder(ctor, new Object[] { dllName });
        method.SetCustomAttribute(attr);
         
         
        Object[] parameters = ConvertJsArray(objParameters);
        // Create the temporary type, and invoke the method.
        Type realType = type.CreateType();
        return realType.InvokeMember(methodName, BindingFlags.Public | BindingFlags.Static | BindingFlags.InvokeMethod, null, null, parameters);
         
    }
     
    private Type ConvertStringNameToType(char letter)
    {
         
        switch(letter)
        {
            case 'l':
                    return Type.GetType("System.Int32");
            case 's': 
                    return Type.GetType("System.String");
            default:
                    return Type.GetType("System.Object");
                 
        }
    }
     
    private object[] ConvertJsArray(object jsArray)
      {
         int arrayLength =  (int) jsArray.GetType().InvokeMember("length", BindingFlags.GetProperty, null, jsArray , new object[] { });
         object[] array = new object[arrayLength];
 
         for (int index = 0; index < arrayLength; index++)
         {
            array[index] = jsArray.GetType().InvokeMember(index.ToString(), BindingFlags.GetProperty, null, jsArray, new object[] { });
         }
 
         return array;
      }
     
     
    [ComVisible(true)]
    public Object InvokeWin32(string dllName, Type returnType,
    string methodName, Type[] parameterTypes, Object[] parameters)
    {
           
           
        // Begin to build the dynamic assembly
        AppDomain domain = AppDomain.CurrentDomain;
        AssemblyName name = new System.Reflection.AssemblyName("PInvokeAssembly");
        AssemblyBuilder assembly = domain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run);
        ModuleBuilder module = assembly.DefineDynamicModule("PInvokeModule");
        TypeBuilder type = module.DefineType("PInvokeType", TypeAttributes.Public | TypeAttributes.BeforeFieldInit);
          
        // Define the actual P/Invoke method
        MethodBuilder method = type.DefineMethod(methodName, MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.Static | MethodAttributes.PinvokeImpl, returnType, parameterTypes);
          
        // Apply the P/Invoke constructor
        ConstructorInfo ctor = typeof (DllImportAttribute).GetConstructor (new Type [] { typeof (string) });
        CustomAttributeBuilder attr = new System.Reflection.Emit.CustomAttributeBuilder(ctor, new Object[] { dllName });
        method.SetCustomAttribute(attr);
          
        // Create the temporary type, and invoke the method.
        Type realType = type.CreateType();
        return realType.InvokeMember(methodName, BindingFlags.Public | BindingFlags.Static | BindingFlags.InvokeMethod, null, null, parameters);
    }
     
    [ComVisible(true)]
    public Object MessageBox(Int32 hWnd, string lpText, string lpCaption, Int32 uType) 
    { 
       Type[]  parameterTypes = { Type.GetType("System.Int32"), Type.GetType("System.String"),Type.GetType("System.String"),Type.GetType("System.Int32")};
       Object[] parameters = {hWnd, lpText, lpCaption, uType};
      
       return InvokeWin32("user32.dll", Type.GetType("System.Int32"), "MessageBoxA", parameterTypes,  parameters );
    }
     
     
     
     
}