Rotating arrow

[Erel]

This is an example of using the form's ForeLayer property with the Polygon method to create a rotating arrow.
The position of each coordinate is calculated using this formula:
New X = X * Cos(degree) - Y * Sin(degree)
New Y = Y * Cos (degree) + X * Sin(degree)

As we are using the forelayer there is no need to redraw the background.

 

[derez]

letter - number

Hi Erel
Thank you for this example - it was helpful for me.
Took me a while to understand why when I type the code I get an error, and if I copy it from youe example - it runs.
The problem is that "l" and "1" in the program look very similar (the name of the array is alX)
see photo.
David

 

[Erel]

I see your point.
Next time it will be named list1 as it is more clear.