TradeStation questions?

[Phil <rhodes@xxxxxxxxxxxxxx>]

   I would like to know, what I have to study to learn how to write dll's
for TradeStation?   Are their any books, courses, software etc. that anyone
can recommend for learning to write dll's etc?

   I am also wondering if anyone has a way to show an area to the right of
the price chart on TradeStation 4 for future projections, retracements,
support etc?  I have seen some charts in TradeStation that do it, so I know
it can be done?   Are their any web sites that show and sell something like
this? 

  Any info on the above would be very helpful!

  Thank You,