Hi Aron;
This is so easy to implement in PB Classic! Here are the basics I use in my frameworks to implement DW buffer viewing in the PB Debugger:
1) Create a "base" ancestor for all your DW Controls (DC).
2) Add an instance variable array to the base DC to hold the data from any DW buffer.
Any ia_dw_data [ ]
3) On the ancestor DC's RetrieveEnd event, code the following:
ia_dw_data = THIS.Object.Data.Primary
4) Now just comment or un-comment the above line in the base ancestor DC to use this in your PB IDE debugging session. In the PB Debugger just introspect the "ia_dw_data" variable to see your DW's primary buffer contents in the debugger itself.
My frameworks use a much more intricate DW buffer snooping - but, still based on the above approach. I am sure that you can take the basics I laid out here and improve it for your needs.
Tip: Comment out the #3 code line above when you build your application .EXE for production to maintain performance. 
HTH
Regards ... Chris