[Помогите!] Сделать Window List

[UpKenedy]

/del
//Удалите сообщение.

[#mov]

delegate bool EnumWindowsProc ( IntPtr hWnd, IntPtr lParam );
 
        [DllImport("user32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool EnumWindows ( EnumWindowsProc lpEnumFunc, IntPtr lParam );
 
        [DllImport("user32.dll", SetLastError = true)]
        static extern int GetWindowText ( IntPtr hWnd, StringBuilder lpString, int nMaxCount );
 
        [DllImport("user32.dll", SetLastError = true)]
        static extern int GetWindowTextLength ( IntPtr hWnd );
 
        [DllImport("user32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool IsWindowVisible ( IntPtr hWnd );
 
        public Form1 () {
            InitializeComponent();
        }
 
        private void btnSearch_Click ( object sender, EventArgs e ) {
            EnumWindows(( hWnd, lParam ) => {
                if (IsWindowVisible(hWnd) && GetWindowTextLength(hWnd) != 0) {
                    listBox1.Items.Add(GetWindowText(hWnd));
                }
                return true;
            }, IntPtr.Zero);
        }
 
        string GetWindowText ( IntPtr hWnd ) {
            int len = GetWindowTextLength(hWnd) + 1;
            StringBuilder sb = new StringBuilder(len);
            len = GetWindowText(hWnd, sb, len);
            return sb.ToString(0, len);
        }
    }

[UpKenedy]

Спасибо огромное)