How to find out if a file exists?

To find out if a file exists on a disk you can use the Visual Basic Dir() function. It has the following syntax:
Dir[(pathname[, attributes])]

In this context, pathname would be the name of the file that you are trying to find. The Attributes can be one or more of the following values (separated by the OR operator)

Attribute
Description

vbNormal
Default Attribute

vbReadOnly
Use if file pathname is read-only

vbHidden
Use if the file pathname is hidden

vbSystem
Use if the file pathname is a system file

vbArchive
Use if the file pathname is an Archive file

vbDirectory
Use if pathname is a directory


Example:
If Dir(myfilename, vbNormal or vbReadOnly or vbHidden or vbSystem or vbArchive) = "" then
Call Msgbox ("This file does not exist")
Else
Call msgbox ("This file does exist")
End If