Console程序后台运行

 [DllImport("User32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", EntryPoint = "FindWindowEx")]   //找子窗体   
        private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("User32.dll", EntryPoint = "SendMessage")]   //用于发送信息给窗体   
        private static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);

        [DllImport("User32.dll", EntryPoint = "ShowWindow")]   //
        private static extern bool ShowWindow(IntPtr hWnd, int type);

Console.Title = "printx在线";
IntPtr intptr = FindWindow(null, "printx在线");
if (intptr != IntPtr.Zero)
{
ShowWindow(intptr, 0);//隐藏这个窗口
}