General Q about haveing a save and a save as

i have my save as, but i want to know how can i check to see if they have saved it before so they dont have to go through all the save as stuff?

Use a boolean and set it to true when they save it first time

Check to see if the file already exists.

how would i see if the file exists?

if Dir$("C:\autoexec.bat") <> "" Then
'the file exists
else
'the file is not there.

thx