how can i use network support in qbasic ?

Sam Mckoy

There is limited network support, depemds on what you mean
by network support - I am assuming multi-user access to
files ?

Difficult with anything but Random Access files, so for
these you should uses

omit the READ or the WRITE depending on the circumstance

Once you have a record in memory for editing, you can use

EditStuff:
  DIM Mystuff AS MyData

  OPEN "filename" FOR RANDOM ACCESS READ WRITE SHARED AS #n
  GET #N,RecNum,MyStuff
    LOCK #n, RecNum

        'do your things to stuff here

        PUT #n,MyStuff
    UNLOCK #n, RecNum
  CLOSE #n
EXIT SUB

Much depends on the LAN,  so the general rule is to keep
records open and locked for as little time as possible.

If you open a record, read in the data, close the record,
wait for user to do their stuff, then save the record,  
someone could have gotten in and edited and saved, then
your edit loses out.

You have to be very wary of logic bombs like this when
playing with multi user data access.

Rob