jl> the basic idea... the only real problem is that _beginthread() 
  jl> and DosCreateThread() are both want the thread function to be 'C'
  jl> and won't take a class-member method as a paramater... so you've 
  jl> got to fake 'em out by passing a static member or using an 
  jl> external 'C' helper function. I asked around in the C++ echo a 
  jl> while back, and the former method (using a static member) was by 
  jl> far the most popular solution... FWIW. 
 
that's what I was looking for... My code at the moment uses a friend
function that is passed a pointer to the class it's dealing with.  I'm not
sure if this will work.  even though it doesn't apply in my program, would
the static member solution be able to work in multiple sessions? i.e. each
class might start it's own instance of a calculation thread.  
 
BTW, what's the difference between DosCreateThread and _beginthread? I
always use DosCreateThread(), I don't know why.

--- Maximus/2 2.01wb