Drawing A Line
v To draw a line on Form1, call the procedure
Form1.Line (x1, y1) - (x2, y2)
v If there is only one form, the form name can be elided
v To get a color, follow the positioning information with
the specification of the color
Form1.Line (x1, y1) - (x2, y2), RGB(255,255,255)
Draw a white line beginning x1 units from the Left
and y1 units from Top, and extending to a point
x2 units from Left and y2 units down from Top