dim pathStr as string
fnum = FreeFile

pathStr ="set Path=%path%;c:\Programs Files\Firebird\Firebird_1_5\bin

Open "c:\autoexec.bat" For Append As #fnum
Print #fnum, pathStr
Close #fnum


Once the lenght of the path approaches its maximum limit of
128 characters (actually 256 if you do it in config.sys), it is much
neater to have two or more statements like

    set PATH=c:\bat;c:\bin;c:\dos;c:\pctools;c:\norton;c:\windows
    set PATH=%PATH%;d:\borland\bc\bin;c:\windows\ndw;d:\wp\gmkw

instead of putting it all on one line (and make it unreadable w/standard
80 cols..)  (Hmm. sounds like a strange 'expert', this Mr. White...)