(转)获取指定进程的主窗口句柄

  staitc类中还包含一个子的static类。

    

using System;
 using System.Runtime.InteropServices;
 
 namespace Macroresolute
 {
     public static class ProcessEx
     {
         private static class NativeMethods
         {
             internal const uint GW_OWNER = 4;
 
             internal delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);
 
             [DllImport("User32.dll", CharSet = CharSet.Auto)]
             internal static extern bool EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam);
 
             [DllImport("User32.dll", CharSet = CharSet.Auto)]
             internal static extern int GetWindowThreadProcessId(IntPtr hWnd, out IntPtr lpdwProcessId);
 
             [DllImport("User32.dll", CharSet = CharSet.Auto)]
             internal static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);
 
             [DllImport("User32.dll", CharSet = CharSet.Auto)]
             internal static extern bool IsWindowVisible(IntPtr hWnd);
         }
 
         public static IntPtr GetMainWindowHandle(int processId)
         {
             IntPtr MainWindowHandle = IntPtr.Zero;
 
             NativeMethods.EnumWindows(new NativeMethods.EnumWindowsProc((hWnd, lParam) =>
             {
                 IntPtr PID;
                 NativeMethods.GetWindowThreadProcessId(hWnd, out PID);
 
                 if (PID == lParam &&
                     NativeMethods.IsWindowVisible(hWnd) &&
                     NativeMethods.GetWindow(hWnd, NativeMethods.GW_OWNER) == IntPtr.Zero)
                 {
                     MainWindowHandle = hWnd;
                     return false;
                 }
 
                 return true;
 
             }), new IntPtr(processId));
 
             return MainWindowHandle;
         }
     }
 }