How to retrieve the length of the data area.

[rob@xxxxxxxxx]

I am accessing several data areas, which may not be the same length.  To 
do this I am using the Retrieve Data Area (QWCRDTAA) API.  However, it 
blows on parameter 5 - "Length of data".  I tried to just used in 
parameter 2 - "Length of receiver variable" but I get a CPF1089-Substring 
specified for data area not valid.  How do I determine the length of a 
data area?
DSPDTAARA DTAARA(...)
Length  . . . . . . . . :   396
I want to do this programmatically.

And what space cadet decided to put data area api's under work management 
instead of Object in Infocenter?

Rob Berendt