当一个应用程序的主要 Form
- 传递给 Application.Run()
的那个 - 有
this.ShowInTaskBar = false;
那么,表示该应用程序的Process
实例具有MainWindowHandle
为0
,这意味着Process.CloseMainWindow()
无法起作用。
我该怎么办?我需要通过Process
实例清洁关闭Form
。
[DllImport("user32.dll")]
public static extern int EnumWindows(EnumWindowsCallback x, int y);
public delegate bool EnumWindowsCallback(int hwnd, int lParam);
[DllImport("user32.dll")]
public static extern void GetWindowText(int h, StringBuilder s, int nMaxCount);
[DllImport("user32.dll")]
public static extern IntPtr PostMessage(IntPtr hWnd, int msg, int wParam, int lParam);
private void ContextMenu_Quit_All(object sender, EventArgs ea)
{
EnumWindowsCallback itemHandler = (hwnd, lParam) =>
{
StringBuilder sb = new StringBuilder(1024);
GetWindowText(hwnd, sb, sb.Capacity);
if ((sb.ToString() == MainWindow.APP_WINDOW_TITLE) &&
(hwnd != mainWindow.Handle.ToInt32())) // Don't close self yet
{
PostMessage(new IntPtr(hwnd), /*WM_CLOSE*/0x0010, 0, 0);
}
// Continue enumerating windows. There may be more instances to close.
return true;
};
EnumWindows(itemHandler, 0);
// Close self ..
}