Dir$ raises a runtime error if you supply it an invalid drive. For example, Dir$ (“d:winhimems.sys”) crashes ifdrive d: doesn’t exist. To check if a file exists, add an error handler:
Function FileExist(filename As String) _ As Boolean On Error Resume Next FileExist = Dir$(filename) <> "" If Err.Number <> 0 Then FileExist _ = False On Error GoTo 0End Function
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