Simple file save as macro

hello all,
first time post, novice help request.
i recorded a macro to save the current file as an ASCI file.
this is the line for the file save:

"longstatus = Part.SaveAs3("C:\Documents\tool.SAT", 0, 0)"

the part i was saving was "tool.sldprt"
i would like to replace "tool" with a variable to represent thecurrent open Solidworks model.
any help would be appreciated.
thanks in advance, edSolidworksApi macros