Add future dates to fileNames using vb6

i have some rec curing filenames reminders that when deleted wold create a new file with a future date eg:

"Wk10-20-2016.rtf" add 1 week would be"Wk10-27-2016.rtf"
"Mo10-25-2016.rtf" add 1 month"Mo11-20-2016.rtf"
"Yr9-20-2015.rtf" add 1 year"Yr10-20-2016.rtf"

How to write this?
isnoend2001Asked:
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aikimarkCommented:
Let's start with this function.  You pass a file name and it returns a date.
Function Q_28773739_Date(parmFileName)
    Dim strFileName As String
    Dim strPeriod As String
    
    strFileName = parmFileName
    strPeriod = Left(strFileName, 2)
    strFileName = Left(strFileName, InStrRev(strFileName, ".") - 1)
    Select Case LCase(strPeriod)
        Case "wk"
            strPeriod = "ww"
        Case "mo"
            strPeriod = "m"
        Case "yr"
            strPeriod = "yyyy"
        Case Else
    End Select
    
    Q_28773739 = DateAdd(strPeriod, 1, CDate(Mid(strFileName, 3)))

End Function

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If you just need the new file name, then you can use this function.
Function Q_28773739_Fn(parmFileName)
    Dim strFileName As String
    Dim strPeriod As String
    
    strFileName = parmFileName
    strPeriod = Left(strFileName, 2)
    strFileName = Left(strFileName, InStrRev(strFileName, ".") - 1)
    Select Case LCase(strPeriod)
        Case "wk"
            strPeriod = "ww"
        Case "mo"
            strPeriod = "m"
        Case "yr"
            strPeriod = "yyyy"
        Case Else
    End Select
    
    Q_28773739_Fn = Left(parmFileName, 2) & Format(DateAdd(strPeriod, 1, CDate(Mid(strFileName, 3))), "mm-dd-yyyy") & Mid(parmFileName, InStrRev(parmFileName, "."))

End Function

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isnoend2001Author Commented:
Thank you works fine
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