I have this code:

Code:
protected override void OnClick(EventArgs e)
{
	base.OnClick(e);

	//MessageBox.Show("");
	game_board.iboard[(MousePosition.Y-Location.Y-30)/62,
			 (MousePosition.X-Location.X-5)/62]=0;
}
When the message box is commented out, the array element doesn't get set. Why?!