Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!uunet!dino!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!ctt31684 From: ctt31684@uxa.cso.uiuc.edu Newsgroups: comp.sys.ibm.pc Subject: Re: File concatenation using Microsoft Message-ID: <46500103@uxa.cso.uiuc.edu> Date: 10 Jun 90 16:54:00 GMT References: <4891@druco.ATT.COM> Lines: 5 Nf-ID: #R:druco.ATT.COM:4891:uxa.cso.uiuc.edu:46500103:000:235 Nf-From: uxa.cso.uiuc.edu!ctt31684 Jun 10 11:54:00 1990 Try setting a very lark file buffer inside your C program when it is reading and writing the file. I'm not sure how to call an DOS command from C program, but I would guess you could try system(). Anyone have any other suggestions?