Using GetData and SetData in reports (especially Order Confirmation)

Hi, I am trying to understand how this Get/Set Data works in the Order Confirmation report (205).

It has only one SetData instruction using CustAddr. This appears to be an 8 element Array holding the Customer Address.

The report however is using things like GetData(17,1) etc.

I altered a copy of the report to show the contents of CustAddr and it does have much more than 8 parts separated by the ± character. But how is it getting this extra data?

Incidentally, GetData(17,1) returns the report title which will either be Order Confirmation or Copy.

Thanks

Dave K

this blog can give you some idea

http://saurav-nav.blogspot.in/2011/07/rtc-report-development-3.html