Simpelt program i C++

Du kan evt. bruge Windows API (Application Programming Interface).

http://msdn.microsoft.com/en-us/library/windows/desktop/ms648394%28v=vs.85%29.aspx

if( GetAsyncKeyState( VK_UP ) &1 )
{
SetCursorPos( 10, 10 );
}
else if( GetAsyncKeyState( VK_DOWN ) &1 )
SetCursorPos( 20, 10 );
else if( ... )
SetCursorPos( 30, 10 );
else if( ... )
SetCursorPos( 40, 10 );

Jeg vil dog råde at du bruger RegisterHotkey :)

Skal dit hoved vindue være i fokus eller skal det kunne fungere udenfor vinduet?

I så fald hvis dit form window er i fokus

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.Up:
                    Cursor.Position = new Point(Screen.PrimaryScreen.WorkingArea.Width / 2, 0);
                    break;
                case Keys.Down:
                    Cursor.Position = new Point(Screen.PrimaryScreen.Bounds.Width / 2, Screen.PrimaryScreen.WorkingArea.Height - 15);
                    break;
                case Keys.Left:
                    Cursor.Position = new Point(0, Screen.PrimaryScreen.Bounds.Height / 2);
                    break;
                case Keys.Right:
                    Cursor.Position = new Point(Screen.PrimaryScreen.Bounds.Width - 15, Screen.PrimaryScreen.Bounds.Height / 2);
                    break;
            }
        }

Du kunne desuden tjekke

http://social.msdn.microsoft.com/Forums/en-US/f7eeb890-a87d-4dbb-9ea8-a77ded3ee363/changing-the-mousecursor-position?forum=Vsexpressvcs

http://msdn.microsoft.com/en-us/library/06tc147t.aspx