Just as any control a Panel has a Validating and Validated event, but IMO they are of not much use here. I should check the limits in every go button test if you would pass 100 or -100 in a separate method. This passing would depend on the direction so you could use a switch statement. Coming to think of it, you could probably do this in the Move method of your robot!
The location property of your robot contains the REAL Panel coordinates. When you Draw you shift these by adding half width and height so that 0,0 is in the middle of the Panel.
Now to show these in the position Label you have to substract half width and height. For the Y coordinate you also have to change sign!
The attached doc will make it clearer I hope.
Now for your border testing you could use both, it is up to you which you prefer. Succes.

form:

C# Syntax (Toggle Plain Text)

private void go10Btn_Click(object sender, EventArgs e)
        {
            try
            {
                throw new robotexception("You can't go that far; limited to 100units of movement");
            }
            catch (robotexception ex)
                {
                    MessageBox.Show(ex.robotstr);
                }
            //Go 10.
            myRobot.Move(10);
            myRobot.Draw(robotpanel);
            //Update location info.
            robotlocationLlb.Text = myRobot.location.ToString();
 
 
 
        }

private void go10Btn_Click(object sender, EventArgs e) { try { throw new robotexception("You can't go that far; limited to 100units of movement"); } catch (robotexception ex) { MessageBox.Show(ex.robotstr); } //Go 10. myRobot.Move(10); myRobot.Draw(robotpanel); //Update location info. robotlocationLlb.Text = myRobot.location.ToString(); }

robot.cs:

C# Syntax (Toggle Plain Text)

 class robotexception : Exception
        {
            public string robotstring;
            public robotexception(string message)
                : base(message)
            {
                robotstring = message;
            }
        }

class robotexception : Exception { public string robotstring; public robotexception(string message) : base(message) { robotstring = message; } }

Nope my stuff still isn't working, but I'm going to try to just work on getting something to at least validate if it goes over 100 and I'd be happy lol