Hi Jim:
I think he means more like :
wine
It allows you to use certain windows programs, APIs in the GUI.
Its pretty decent, doesnt work for anything too complicated, and the speed leaves some to be desired, but will allow you to get by.
If you really need a windows environment check out
www.vmware.com to use a virtual machine within your Linux.
Teh difference is that while the former deals with an EMULATED environment, vmware and the like provide a whole different environment for Windows.
HTH