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How can I get at the Win32 API from a .NET program?

  Shared By: Latasha Wilson    Date: Mar 04    Category: .Net Framework    Views: 1092


Use P/Invoke. This uses similar technology to COM Interop, but is used to access static DLL entry points instead of COM objects. Here is an example of C# calling the Win32 MessageBox function:

using System;
using System.Runtime.InteropServices;

class MainApp
[DllImport("user32.dll", EntryPoint="MessageBox", SetLastError=true, CharSet=CharSet.Auto)]
public static extern int MessageBox(int hWnd, String strMessage, String strCaption, uint uiType);

public static void Main()
MessageBox( 0, "Hello, this is PInvoke in operation!", ".NET", 0 );
Pinvoke.net is a great resource for off-the-shelf P/Invoke signatures.


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