VS_PushSets()        Save all of the SET settings to a stack

Description:

  VS_PushSets() will save all of the SET settings to a stack for later
  recall by VS_PopSets().  This function is very similar to VS_GrabScr()
  and VS_PushDbf().

Syntax:     

  VS_PushSets()

Pass:       

  Nothing

Return:     

  VS_PushSets() will always return NIL.

Notes:      


Example:    

  VS_PushSets()
     SET(_SET_ALTFILE,"MYFILE.TXT")
     ...
  VS_PopSets()

Usage:      

  VS_PushSets() should be called by your programs prior to changing any
  SET settings.  When you program finishes, it should call VS_PopSets().
   This will eliminate any unwanted side effects.