I think it is worth mentioning that Progress can resize terminal window. So you can have for example in your protermcap file definitions for linux terminal: :li#25, :co#80 and for example linux-wide :li#25, :co#132 and by changing TERM you can resize window (I guess that also require proper client, but at least it works with Putty).
TERM="linux-wide" and you have 132 columns, TERM="linux" and you are back to 80 columns.