Graphic cursor problem

[Han]

Insert a DEBUG command right before the last IF-THEN-END block. This will allow you to enter your program in debug mode and examine the contents of the variables. This is the easiest way to track down bugs in a program.

Code:

DEBUG; // <--- insert this command here
    IF cursor:=1 THEN
      dx:=mcrd(index,1); dy:=mcrd(index,2); 
      INVERT_P(G0,dx-4,dy+2,dx+11,dy+17);
    END;