C# Alt+Tab Block Codes

1-) library ;
using System.Runtime.InteropServices;
add
2-)Tanımlama Yapılan yere
        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool SetForegroundWindow(IntPtr hWnd);

eklenecek
3-)Timer add enabled true
SetForegroundWindow(this.Handle);

and this cede entery