REM  ***** BASIC  *****
Sub generate_id()
    REM Generate a 16-character long random ID for Pocket Archive.
    REM Use this macro in Libreoffice Calc on a single or multiple cells for
    REM quickly filling in any range of cells with fresh IDs.
    REM The CurrentSelection will even contain the stacked ranges
    REM of additional sheets IF MORE THAN ONE SHEET IS SELECTED.

    Const CHARS As String = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
    Const STRING_LENGTH As Integer = 16
    Dim oSelection As Object
    Dim oCell As Object
    Dim sRandomString As String
    Dim i As Integer
    Dim iCharIndex As Integer
    Dim iCharsLength As Integer

    ' Get the current selection.
    iCharsLength = Len(CHARS)

    sel =ThisComponent.CurrentSelection
    If sel.supportsService("com.sun.star.sheet.SheetCellRanges") Then
        rgs = sel
    Else
        If NOT sel.supportsService("com.sun.star.sheet.SheetCellRange") Then Exit Sub
        rgs = ThisComponent.createInstance("com.sun.star.sheet.SheetCellRanges")
        rgs.addRangeAddress(sel.RangeAddress, False)
    End If
    For Each rg In rgs
        uR = rg.Rows.Count - 1
        uC = rg.Columns.Count - 1
        Randomize
        For r = 0 To uR
            For c = 0 To uC
                rcCell = rg.getCellByPosition(c, r)
                sRandomString = ""
                For i = 1 To STRING_LENGTH
                    iCharIndex = Int((iCharsLength * Rnd) + 1)
                    sRandomString = sRandomString & Mid(CHARS, iCharIndex, 1)
                Next i
                rcCell.setString(sRandomString)
            Next c
        Next r
    Next rg
End Sub