There is an issue with Multithreading and Win95: OnComEvent will WAIT for an event when the program runs on win95 and will NOT wait (as i think it should) on win NT. Query OS at runtime and place loops inside the code to wait for the event if NT is the OS otherwise do not loop as on win95 OnComEvent will not return if there is no ComEvent. You should also use timeouts as on win95 you will not be in control if OnComEvent hangs... Andreas Jim robertson wrote: > > Hi folks, > > Anyone know if a Win 95 program developed with VB and the MSCOMM.OCX will > work with win NT? What, if anything do I need to do to make it win NT > compatible? > > Anyone with a TM4 based programmer and windows NT willing to test this for > me? > > Thanks if you can help any! > > Jim