1 /// <summary>
2 /// 0-关闭窗口 1-正常大小显示 2最小化窗口 3-最大化窗口
3 /// </summary>
4 /// <param name="hwnd"></param>
5 /// <param name="nCmdShow"></param>
6 /// <returns></returns>
7 [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
8 public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);
9
10 /// <summary>
11 /// 显示程序
12 /// </summary>
13 /// <param name="hwnd">窗口句柄</param>
14 /// <param name="nCmdshow">0-关闭窗口 1-正常大小显示 2最小化窗口 3-最大化窗口</param>
15 /// <returns></returns>
16 public int DisPlayWindow(IntPtr hwnd, int nCmdshow)
17 {
18 return ShowWindow(hwnd, nCmdshow);
19 }
20
21 public Process Run(string exeName)
22 {
23 return Process.Start(exeName);
24 }
25
26 IntPtr hWnd = IntPtr.Zero;
27 Process process=null;
28 bool IsMini = true;
29 int nCmdshow = 1;
30 private void button1_Click(object sender, EventArgs e)
31 {
32 //获取句柄
33 if (process == null)
34 {
35 string exeName = Application.StartupPath + @"\CCD\CameraVision.exe";
36 //创建启动进程信息
37 process = Run(exeName);
38 }
39 else
40 {
41 if (IsMini)
42 {
43 DisPlayWindow(process.MainWindowHandle, 1);
44 IsMini = false;
45 }
46 else
47 {
48 DisPlayWindow(process.MainWindowHandle, 2);
49 IsMini = true;
50 }
51 }
52 }
这里实现的是点击一个CCD按钮，打开CCD窗口，再点击CCD按钮，隐藏CCD窗口，测试发现，句柄不能通过这种方式获取：IntPtr hWnd=process.MainWindowHandle；而是直接用process.MainWindowHandle来表示这个进程的句柄，才可以实现。
这里还有一些其他的方法：
/// <summary>
/// 0-隐藏窗口 1-正常大小显示
/// </summary>
/// <param name="hWnd"></param>
/// <param name="_value"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "ShowWindow")]
public static extern IntPtr ShowWindow(IntPtr hWnd, int _value); /// <summary>
/// 获取窗口句柄
/// </summary>
/// <param name="lp1"></param>
/// <param name="lp2"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "FindWindow")]
public static extern IntPtr FindWindow(string lp1, string lp2); /// <summary>
/// 获取当前窗口的句柄
/// </summary>
/// <returns></returns>
[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetForegroundWindow();
/下面是通过进程的名字（CameraVision.exe）来获取一个进程的句柄:
