捕捉消息框中的文字

把桌面上弹出的消息框中的文字取出来

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
using System.Xml;
using System.Runtime.InteropServices;
namespace WindowsApplication26
... {
public partial class Form1:Form
... {

public class HookMsg
... {

Win32APIfunctions #region Win32APIfunctions
private const int WH_CBT = 0x5 ;
private const int IDC_OK = 0x1 ;
private const int IDC_Text = 0xFFFF ;


[DllImport( " user32.dll " )]
protected static extern IntPtrSetWindowsHookEx( int code,HookProcfunc,IntPtrhInstance, int threadID);
[DllImport( " user32.dll " )]
protected static extern int UnhookWindowsHookEx(IntPtrhhook);
[DllImport( " user32.dll " )]
protected static extern int CallNextHookEx(IntPtrhhook, int code,IntPtrwParam,IntPtrlParam);


[DllImport( " user32.dll " )]
protected static extern int GetWindowText(IntPtrhwnd,[Out]StringBuilderlpString, int nMaxCount);

[DllImport( " user32.dll " )]
protected static extern int GetClassName(IntPtrhwnd,[Out]StringBuilderlpString, int nMaxCount);

[DllImport( " user32.dll " )]
protected static extern int SetWindowText(IntPtrhWnd, string lpString);

[DllImport( " user32.dll " )]
protected static extern IntPtrGetDlgItem(IntPtrhwnd, int id);
[DllImport( " User32 " )]
protected static extern int SetDlgItemText(IntPtrhDlg, int nIDDlgItem, string lpString);
[DllImport( " user32.dll " )]
protected static extern int GetDlgItemText(IntPtrhDlg, int nIDDlgItem,[Out]StringBuilderlpString, int nMaxCount);

[DllImport( " user32.dll " ,EntryPoint = " MessageBox " )]
protected static extern int _MessageBox(IntPtrhwnd, string text, string caption,
int options);

[DllImport( " user32.dll " )]
protected static extern IntPtrGetActiveWindow();

[DllImport( " user32.dll " )]
protected static extern void DestroyWindow(IntPtrhwnd);

#endregion

private static System.IntPtrm_hhook;

public delegate int HookProc( int code,IntPtrwParam,IntPtrlParam);

protected static HookProcm_filterFunc;

static HookMsg()
... {
if (m_filterFunc == null )
m_filterFunc = new HookProc(CoreHookProc);
}

public static void Install()
... {

m_hhook = SetWindowsHookEx(WH_CBT,m_filterFunc,IntPtr.Zero,AppDomain.GetCurrentThreadId());
}

public static void Uninstall()
... {
UnhookWindowsHookEx(m_hhook);
}

// CallBack
protected static int CoreHookProc( int code,IntPtrwParam,IntPtrlParam)
... {

if (code == 5 )
... {

StringBuildersb = new StringBuilder();
sb.Capacity = 255 ;
// Title
GetWindowText(wParam,sb, 255 );
string strTitle = " jinjazz看到了: " + sb.ToString();

// Text
GetDlgItemText(wParam,IDC_Text,sb, 255 );
string strText = " jinjazz看到了: " + sb.ToString();

// 获取按钮
int style = 0 ;
for ( int i = 0 ;i <= 5 ;i ++ )
... {
if (GetDlgItem(wParam,i) != IntPtr.Zero)
style += i;
}

SetDlgItemText(wParam,IDC_Text,strText);
SetWindowText(wParam,strTitle);
SetWindowText(GetDlgItem(wParam,( int )DialogResult.No), " jinjazzOK " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.Cancel), " jinjazzCancel " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.Abort), " jinjazzAbort " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.Ignore), " jinjazzIgnore " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.None), " jinjazzNone " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.OK), " jinjazzOK " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.Retry), " jinjazzRetry " );
SetWindowText(GetDlgItem(wParam,( int )DialogResult.Yes), " jinjazzYes " );
}

// returnCallNextHookEx(this.m_hhook,code,wParam,lParam);
return 0 ;
}
}

public Form1()
... {
InitializeComponent();
}

private void Form1_Load( object sender,EventArgse)
... {

}

private void button1_Click( object sender,EventArgse)
... {
MessageBox.Show( this , " 确定按钮 " , " 标题 " );
}

private void button2_Click( object sender,EventArgse)
... {
MessageBox.Show( this , " 确定按钮 " , " 标题 " ,MessageBoxButtons.YesNoCancel);
}

private void button3_Click( object sender,EventArgse)
... {
MessageBox.Show( this , " 确定按钮 " , " 标题 " ,MessageBoxButtons.AbortRetryIgnore);
}

private void checkBox1_CheckedChanged( object sender,EventArgse)
... {
if ( this .checkBox1.Checked)
... {
HookMsg.Install();
}
else
... {
HookMsg.Uninstall();
}
}
}
}