www.pudn.com > CS.rar > MessageBox.cs

// MessageBox.cs - Two ways to call Win32 MessageBox 
// function using P/Invoke. 
// 
// Code from _Programming the .NET Compact Framework with C#_ 
// and _Programming the .NET Compact Framework with VB_ 
// (c) Copyright 2002-2004 Paul Yao and David Durant.  
// All rights reserved. 
 
using System; 
using System.Runtime.InteropServices; 
 
namespace PlatformInvoke 
{ 
   class PI_MessageBox 
   { 
      public const string strApp = "MessageBox"; 
 
      [DllImport("coredll.dll")] 
      public static extern int 
      MessageBox (IntPtr hWnd, string lpText, string lpCaption, 
         int uType); 
 
      public const int MB_OK = 0x00000000; 
      public const int MB_OKCANCEL = 0x00000001; 
      public const int MB_ABORTRETRYIGNORE = 0x00000002; 
      public const int MB_YESNOCANCEL = 0x00000003; 
      public const int MB_YESNO = 0x00000004; 
      public const int MB_RETRYCANCEL = 0x00000005; 
      public const int MB_ICONHAND = 0x00000010; 
      public const int MB_ICONQUESTION = 0x00000020; 
      public const int MB_ICONEXCLAMATION = 0x00000030; 
      public const int MB_ICONASTERISK = 0x00000040; 
      public const int MB_ICONWARNING = MB_ICONEXCLAMATION; 
      public const int MB_ICONERROR = MB_ICONHAND; 
      public const int MB_ICONINFORMATION = MB_ICONASTERISK; 
      public const int MB_ICONSTOP = MB_ICONHAND; 
      public const int MB_DEFBUTTON1 = 0x00000000; 
      public const int MB_DEFBUTTON2 = 0x00000100; 
      public const int MB_DEFBUTTON3 = 0x00000200; 
      public const int MB_DEFBUTTON4 = 0x00000300; 
      public const int MB_APPLMODAL = 0x00000000; 
      public const int MB_SETFOREGROUND = 0x00010000; 
      public const int MB_TOPMOST = 0x00040000; 
 
      [DllImport("coredll.dll")] 
      public static extern int 
      MessageBox (IntPtr hWnd, string lpText, string lpCaption, 
         MB uType); 
 
      public enum MB 
      { 
         MB_OK = 0x00000000, 
         MB_OKCANCEL = 0x00000001, 
         MB_ABORTRETRYIGNORE = 0x00000002, 
         MB_YESNOCANCEL = 0x00000003, 
         MB_YESNO = 0x00000004, 
         MB_RETRYCANCEL = 0x00000005, 
         MB_ICONHAND = 0x00000010, 
         MB_ICONQUESTION = 0x00000020, 
         MB_ICONEXCLAMATION = 0x00000030, 
         MB_ICONASTERISK = 0x00000040, 
         MB_ICONWARNING = MB_ICONEXCLAMATION, 
         MB_ICONERROR = MB_ICONHAND, 
         MB_ICONINFORMATION = MB_ICONASTERISK, 
         MB_ICONSTOP = MB_ICONHAND, 
         MB_DEFBUTTON1 = 0x00000000, 
         MB_DEFBUTTON2 = 0x00000100, 
         MB_DEFBUTTON3 = 0x00000200, 
         MB_DEFBUTTON4 = 0x00000300, 
         MB_APPLMODAL = 0x00000000, 
         MB_SETFOREGROUND = 0x00010000, 
         MB_TOPMOST = 0x00040000 
      } 
  
      static void Main() 
      { 
         // Flags defined as set of const values. 
         MessageBox(IntPtr.Zero, "One way to define flags", 
            strApp, MB_OK | MB_TOPMOST); 
 
         // Flags defined as members of enum 
         MessageBox(IntPtr.Zero, "Another way to define flags", 
            strApp, MB.MB_OK | MB.MB_TOPMOST); 
      } 
   } 
}