C#可调用API接口来获取窗口句柄,发送消息控制其余程序窗体大小

根据标题获取窗口句柄

using System; 

  using System.Runtime.InteropServices; 

  namespace tstfindwindow 

  { 

  ///  

  /// Class1 的摘要说明。 

  ///  

  class Class1 

  { 

  [DllImport( "User32.dll ")] 

  public static extern System. IntPtr FindWindowEx(System. IntPtr parent, System. IntPtr childe, string strclass, string strname); 

  ///  

  /// 应用程序的主入口点。 

  ///  

  [STAThread] 

  static void Main(string[] args) 

  { 

  // 

  //TODO: 在此处添加代码以启动应用程序 

  // 

  IntPtr p=FindWindowEx(System.IntPtr.Zero,System.IntPtr.Zero,null,"窗口标题"); 

  } 

  }

发送消息控制最大、最小

[DllImport("user32.dll", EntryPoint = "PostMessage")]

public static extern int PostMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

public const int WM_SYSCOMMAND = 0x112;

public const int SC_MINIMIZE = 0xF020;

public const int SC_MAXIMIZE = 0xF030;

private void button1_Click(object sender, EventArgs e)

{

    PostMessage(Handle, WM_SYSCOMMAND, SC_MINIMIZE, 0);

}

 

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