对于仍然疑惑的所有人,这是答案:
List<IntPtr> GetRootWindowsOfProcess(int pid)
{
List<IntPtr> rootWindows = GetChildWindows(IntPtr.Zero);
List<IntPtr> dsProcRootWindows = new List<IntPtr>();
foreach (IntPtr hWnd in rootWindows)
{
uint lpdwProcessId;
WindowsInterop.User32.GetWindowThreadProcessId(hWnd, out lpdwProcessId);
if (lpdwProcessId == pid)
dsProcRootWindows.Add(hWnd);
}
return dsProcRootWindows;
}
public static List<IntPtr> GetChildWindows(IntPtr parent)
{
List<IntPtr> result = new List<IntPtr>();
GCHandle listHandle = GCHandle.Alloc(result);
try
{
WindowsInterop.Win32Callback childProc = new WindowsInterop.Win32Callback(EnumWindow);
WindowsInterop.User32.EnumChildWindows(parent, childProc, GCHandle.ToIntPtr(listHandle));
}
finally
{
if (listHandle.IsAllocated)
listHandle.Free();
}
return result;
}
private static bool EnumWindow(IntPtr handle, IntPtr pointer)
{
GCHandle gch = GCHandle.FromIntPtr(pointer);
List<IntPtr> list = gch.Target as List<IntPtr>;
if (list == null)
{
throw new InvalidCastException("GCHandle Target could not be cast as List<IntPtr>");
}
list.Add(handle);
// You can modify this to check to see if you want to cancel the operation, then return a null here
return true;
}
适用于WindowsInterop:
public delegate bool Win32Callback(IntPtr hwnd, IntPtr lParam);
对于 WindowsInterop.User32:
[DllImport("user32.dll")]
public static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
[DllImport("user32.Dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumChildWindows(IntPtr parentHandle, Win32Callback callback, IntPtr lParam);
现在可以通过 GetRootWindowsOfProcess 获取每个根窗口,通过 GetChildWindows 获取它们的子窗口。