Source code in the freebasic programming language

' FB 1.05.0 Win64

#Include "dir.bi"

Function IsDirEmpty(dirPath As String) As Boolean
  Err = 0
  ' check dirPath is a valid directory
  Dim As String fileName = Dir(dirPath, fbDirectory)
  If Len(fileName) = 0 Then
    Err = 1000  ' dirPath is not a valid path
    Return False
  End If
  ' now check if there are any files/subdirectories in it other than . and ..
  Dim fileSpec As String = dirPath + "\*.*"
  Const attribMask = fbNormal Or fbHidden Or fbSystem Or fbDirectory
  Dim outAttrib As UInteger
  fileName = Dir(fileSpec, attribMask, outAttrib)  ' get first file
  Do
    If fileName <> ".." AndAlso fileName <> "." Then
      If Len(fileName) = 0 Then Return True
      Exit Do
    End If
    fileName = Dir  ' get next file
  Loop
  Return False
End Function

Dim outAttrib As UInteger
Dim dirPath As String = "c:\freebasic\docs"  ' known to be empty
Dim empty As Boolean = IsDirEmpty(dirPath)
Dim e As Long = Err
If e = 1000 Then
  Print "'"; dirPath; "' is not a valid directory"
  End
End If
If empty Then
  Print "'"; dirPath; "' is empty"
Else
  Print "'"; dirPath; "' is not empty"
End If
Print
Print "Press any key to quit"
Sleep