using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace cstest
{
public partial class Form1 : Form
{
//定義一個符合WINAPI返回值和參數的委託
public delegate bool CallBack(IntPtr hwnd, int lParam);
//聲明符合上述委託的函數(定義一個函數指針)
private static CallBack myCallBack;
public Form1()
{
myCallBack = new CallBack(Report);
InitializeComponent();
GetHandle("C#");
this.textBox1.Multiline = true;
this.textBox1.Dock = DockStyle.Fill;
}
private void GetHandle(string windcaption)
{
IntPtr mainHandle = FindWindow(null, windcaption);
if (IntPtr.Zero != mainHandle)
{
AppendText(string.Format("{0}句柄:{1}", windcaption, Convert.ToString((int)mainHandle,16)));
//EnumChildWindows((int)mainHandle, myCallBack, 0);
//修改窗口標題
SetWindowText((int)mainHandle, "C#");
StringBuilder s = new StringBuilder(512);
//獲取控件標題
int i = GetWindowText(mainHandle, s, s.Capacity);
AppendText(string.Format("句柄{0}的caption:{1}", Convert.ToString((int)mainHandle, 16), s.ToString()));
//枚舉所有子窗體,並將子窗體句柄傳給myCallBack
EnumChildWindows((int)mainHandle, myCallBack, 0);
}
}
private void AppendText(string msg)
{
this.textBox1.AppendText(msg);
this.textBox1.AppendText("\r\n");
}
//根據窗體句柄,輸出窗體caption
public bool Report(IntPtr hWnd, int lParam)
{
StringBuilder s = new StringBuilder(512);
int i = GetWindowText((IntPtr)hWnd, s, s.Capacity);
AppendText(string.Format("句柄{0}的caption:{1}", Convert.ToString((int)hWnd, 16), s.ToString()));
return true;
}
/// <summary>
/// 獲取窗體的句柄函數
/// </summary>
/// <param name="lpClassName">窗口類名</param>
/// <param name="lpWindowName">窗口標題名</param>
/// <returns>返回句柄</returns>
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll")]
public static extern int EnumWindows(CallBack x, int y);
[DllImport("user32.dll")]
private static extern IntPtr EnumChildWindows(int hWndParent, CallBack lpEnumFunc, int lParam);
[DllImport("user32.dll")]
public static extern int SetWindowText(int handle, string title);
[DllImport("user32.dll", EntryPoint = "GetWindowText")]
public static extern int GetWindowText(IntPtr hwnd, StringBuilder lpString,int cch);
[DllImport("User32.dll", EntryPoint = "SendMessage")]
private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, StringBuilder lParam);
private void button1_Click(object sender, EventArgs e)
{
StringBuilder s = new StringBuilder(512);
//獲取控件標題,對TRichEdit無效
//int i = GetWindowText((IntPtr)int.Parse(txtHandle.Text), s, s.Capacity);
//獲取控件標題,對TRichEdit有效
int i = SendMessage((IntPtr)int.Parse(txtHandle.Text), 0x000D, 1000, s);
AppendText(string.Format("句柄{0}的caption:{1}", txtHandle.Text, s.ToString()));
}
}
}