标签：hub last hoj scn div pre apm wol 高度
接下来，我们来演示不同程序中，怎么通过窗体句柄控制其它程序窗体。
演示的例子是：控制系统的记事本窗体，先移动，再最大化，最后关闭
要求：桌面上有一个记事本，名称是：测试文本.txt - 记事本，保证是打开的
界面只有一个按钮，btnCloseText
引用的windowapi函数dll如下：
/// <summary> /// 获取窗体的句柄函数 /// </summary> /// <param name="lpClassName">窗口类名</param> /// <param name="lpWindowName">窗口标题名</param> /// <returns>返回句柄</returns> [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); /// <summary> /// 移动窗体的函数 /// </summary> /// <param name="hWnd">窗体句柄</param> /// <param name="x">窗体新位置x轴坐标</param> /// <param name="y">窗体新位置y轴坐标</param> /// <param name="nWidth">窗体新位置宽度</param> /// <param name="nHeight">窗体新位置高度</param> /// <param name="BRePaint">是否刷新窗体</param> /// <returns></returns> [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern int MoveWindow(IntPtr hWnd, int x, int y, int nWidth, int nHeight, bool BRePaint); /// <summary> /// 通过句柄，窗体显示函数 /// </summary> /// <param name="hWnd">窗体句柄</param> /// <param name="cmdShow">显示方式</param> /// <returns>返工成功与否</returns> [DllImport("user32.dll", EntryPoint = "ShowWindowAsync", SetLastError = true)] public static extern bool ShowWindow(IntPtr hWnd, int cmdShow); /// <summary> /// 发送消息到窗体函数 /// </summary> /// <param name="hwnd">窗体句柄</param> /// <param name="wMsg">消息类型</param> /// <param name="wParam">附带消息</param> /// <param name="lParam"></param> /// <returns></returns> [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)] public static extern IntPtr SendMessage(IntPtr hwnd, uint wMsg, int wParam, int lParam);
实现代码：
//wMsg类型，关闭窗体
private const int WM_CLOSE = 0x10;
private void btnCloseText_Click(object sender, EventArgs e)
{
IntPtr textHandle = FindWindow(null, "测试文本.txt - 记事本");
if (textHandle != IntPtr.Zero)
{
//移动记事本窗体
MoveWindow(textHandle, 0, 100, 800, 600, true);
//延时3秒后
Thread.Sleep(3000);
//设置窗体最大化显示
ShowWindow(textHandle, 3);
//延时3秒后
Thread.Sleep(3000);
//向记事本程序窗体发送关闭信息
SendMessage(textHandle, WM_CLOSE,0,0);
}
}
整体代码：
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; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsForms { public partial class Form2 : Form { public Form2() { InitializeComponent(); } /// <summary> /// 获取窗体的句柄函数 /// </summary> /// <param name="lpClassName">窗口类名</param> /// <param name="lpWindowName">窗口标题名</param> /// <returns>返回句柄</returns> [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); /// <summary> /// 移动窗体的函数 /// </summary> /// <param name="hWnd">窗体句柄</param> /// <param name="x">窗体新位置x轴坐标</param> /// <param name="y">窗体新位置y轴坐标</param> /// <param name="nWidth">窗体新位置宽度</param> /// <param name="nHeight">窗体新位置高度</param> /// <param name="BRePaint">是否刷新窗体</param> /// <returns></returns> [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern int MoveWindow(IntPtr hWnd, int x, int y, int nWidth, int nHeight, bool BRePaint); /// <summary> /// 通过句柄，窗体显示函数 /// </summary> /// <param name="hWnd">窗体句柄</param> /// <param name="cmdShow">显示方式</param> /// <returns>返工成功与否</returns> [DllImport("user32.dll", EntryPoint = "ShowWindowAsync", SetLastError = true)] public static extern bool ShowWindow(IntPtr hWnd, int cmdShow); /// <summary> /// 发送消息到窗体函数 /// </summary> /// <param name="hwnd">窗体句柄</param> /// <param name="wMsg">消息类型</param> /// <param name="wParam">附带消息</param> /// <param name="lParam"></param> /// <returns></returns> [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Auto)] public static extern IntPtr SendMessage(IntPtr hwnd, uint wMsg, int wParam, int lParam); //wMsg类型，关闭窗体 private const int WM_CLOSE = 0x10; private void btnCloseText_Click(object sender, EventArgs e) { IntPtr textHandle = FindWindow(null, "测试文本.txt - 记事本"); if (textHandle != IntPtr.Zero) { //移动记事本窗体 MoveWindow(textHandle, 0, 100, 800, 600, true); //延时3秒后 Thread.Sleep(3000); //设置窗体最大化显示 ShowWindow(textHandle, 3); //延时3秒后 Thread.Sleep(3000); //向记事本程序窗体发送关闭信息 SendMessage(textHandle, WM_CLOSE,0,0); } } } }
演示结果如下：
1）刚开始运行结果（图片太大，不截图）
2）窗体移动后结果（图片太大，不截图）
3）最大化窗体结果（图片太大，不截图）
4）关闭记事本结果（图片太大，不截图）
标签：hub last hoj scn div pre apm wol 高度
原文地址：http://www.cnblogs.com/xielong/p/6692887.html
