C#笔记（18）MessageBox.Show自定义按钮文字

public class MessageBoxEx      {          public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, string[] buttonTitles)          {              MessageForm frm = new MessageForm(buttons, buttonTitles);             frm.WatchForActivate = true;              DialogResult result = MessageBox.Show(frm, text, caption, buttons);              frm.Close();              return result;          }          public static DialogResult Show(string text, string caption, MessageBoxButtons buttons,              MessageBoxIcon icon, MessageBoxDefaultButton defaultButton, string[] buttonTitles)          {              MessageForm frm = new MessageForm(buttons, buttonTitles);              frm.Show();              frm.WatchForActivate = true;              DialogResult result = MessageBox.Show(frm, text, caption, buttons, icon, defaultButton);              frm.Close();              return result;          }          class MessageForm : Form          {              IntPtr _handle;              MessageBoxButtons _buttons;              string[] _buttonTitles = null;              bool _watchForActivate = false;              public bool WatchForActivate              {                  get { return _watchForActivate; }                  set { _watchForActivate = value; }              }              public MessageForm(MessageBoxButtons buttons, string[] buttonTitles)              {                  _buttons = buttons;                  _buttonTitles = buttonTitles;                  // Hide self form, and don't show self form in task bar.                  this.Text = "";                  this.StartPosition = FormStartPosition.CenterScreen;                  this.Location = new Point(-32000, -32000);                  this.ShowInTaskbar = false;              }              protected override void OnShown(EventArgs e)              {                  base.OnShown(e);                  // Hide self form, don't show self form even in task list.                  NativeWin32API.SetWindowPos(this.Handle, IntPtr.Zero, 0, 0, 0, 0, 659);              }              protected override void WndProc(ref System.Windows.Forms.Message m)              {                  if (_watchForActivate && m.Msg == 0x0006)                  {                      _watchForActivate = false;                      _handle = m.LParam;                      CheckMsgbox();                  }                  base.WndProc(ref m);              }              private void CheckMsgbox()              {                  if (_buttonTitles == null || _buttonTitles.Length == 0)                      return;                  // Button title index                  int buttonTitleIndex = 0;                  // Get the handle of control in current window.                  IntPtr h = NativeWin32API.GetWindow(_handle, GW_CHILD);                  // Set those custom titles to the three buttons(Default title are: Yes, No and Cancle).                  while (h != IntPtr.Zero)                  {                      if (NativeWin32API.GetWindowClassName(h).Equals("Button"))                      {                          if (_buttonTitles.Length > buttonTitleIndex)                          {                              // Changes the text of the specified window's title bar (if it has one).                               // If the specified window is a control, the text of the control is changed.                               // However, SetWindowText cannot change the text of a control in another application.                              NativeWin32API.SetWindowText(h, _buttonTitles[buttonTitleIndex]);                              buttonTitleIndex++;                          }                      }                      // Get the handle of next control in current window.                      h = NativeWin32API.GetWindow(h, GW_HWNDNEXT);                  }              }          }          public const int GW_CHILD = 5;          public const int GW_HWNDNEXT = 2;          public class NativeWin32API          {              [DllImport("user32.dll", CharSet = CharSet.Auto)]              public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int Width, int Height, int flags);              [DllImport("user32.dll")]              public static extern IntPtr GetWindow(IntPtr hWnd, Int32 wCmd);              [DllImport("user32.dll")]              public static extern bool SetWindowText(IntPtr hWnd, string lpString);              [DllImport("user32.dll")]              public static extern int GetClassNameW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)]StringBuilder lpString, int nMaxCount);              public static string GetWindowClassName(IntPtr handle)              {                  StringBuilder sb = new StringBuilder(256);                  // Retrieves the name of the class to which the specified window belongs                  GetClassNameW(handle, sb, sb.Capacity);                  return sb.ToString();              }          }      }