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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Aug 6, 1997



Application Security Testing: An Integral Part of DevOps

File Exists?

One way to test whether a specific file exists is to open the file for input and check VB's error flag. An error will occur if the file does not exist.

Use VB's 'Dir$' function to accomplish the same task. Call 'Dir$' with the complete filespec. 'Dir$' will return the exact file name if that file exists or a null string if it does not. For example:

         If Dir$("C:\WINDOWS\WIN.INI") _
                <> "" Then
                'file Win.ini exists!
                'file Win.ini does not exist!
         End If

Chuong Van
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