Tracing connection between TDW_NOCOMPRESS SAPGUI envrionment variable to bothering window and actual data compression routine.

or did they find your blog without you telling them? I know for a fact that SAP is very interested in such things (having written tools like this as well ;) and desperately tries to keep the lid on the can (not so successful as your blog shows).

And yes, I tried out your code and it works ;).