Image changing button.

Question

I'm trying to make a button that well change its image when you click it.

Here's my code so far.

 buttonTile1.Image = new Bitmap (GetType(), "CharTEST.bmp") ;

But,I keep getting the error,On click of the button.

Resource 'CharTEST.bmp' cannot be found in class 'Gamer_Interface_2009.Form1'.

Can anyone help me with this?
in advance thx!