I've found that the Line Intersection behaves strangely.
If I delete a value in any of the blocks, or if I enter a minus, I get an error message.
	
	
	
	
	
If I delete a value in any of the blocks, or if I enter a minus, I get an error message.
Code:
Error in btCalculate_click in form1.vb
Det går inte att konvertera strängen  till typen Double. 
("Not possible to convert string to type Double" (my translation))
      
      
 