'================================================================= ' GLOBAL SETTINGS – adjust as needed '================================================================= Private Const KEY_LENGTH As Long = 16 ' length of a plain key (characters) Private Const KEY_HASH_ALGO As String = "SHA256" ' only SHA256 is used internally
'================================================================= ' SHA‑256 → Base64 helper (uses MSXML for crypto) '================================================================= Private Function ComputeSHA256Base64(ByVal s As String) As String Dim xml As Object Set xml = CreateObject("MSXML2.DOMDocument.6.0") Dim hashObj As Object Set hashObj = CreateObject("System.Security.Cryptography.SHA256Managed") Dim bytes() As Byte bytes = StrConv(s, vbFromUnicode) ' UTF‑8 bytes Dim hashBytes() As Byte hashBytes = hashObj.ComputeHash_2((bytes)) 'Convert to Base64 Dim base64 As Object Set base64 = CreateObject("Microsoft.XMLDOM").createElement("b") base64.DataType = "bin.base64" base64.nodeTypedValue = hashBytes ComputeSHA256Base64 = base64.Text End Function invoice manager for excel activation key
'================================================================= ' ENTRY POINT – runs automatically when workbook opens '================================================================= Private Sub Workbook_Open() Call InitWorkbook Call PromptForActivation End Sub invoice manager for excel activation key
'================================================================= ' INITIALISATION (hide sheets, create tables if missing) '================================================================= Public Sub InitWorkbook() Dim wsInv As Worksheet, wsKey As Worksheet '--- Invoices sheet ------------------------------------------------ On Error Resume Next Set wsInv = ThisWorkbook.Worksheets("Invoices") On Error GoTo 0 If wsInv Is Nothing Then Set wsInv = ThisWorkbook.Worksheets.Add(After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)) wsInv.Name = "Invoices" wsInv.Range("A1:G1").Value = Array("Date", "InvoiceNo", "Customer", "Items", "Amount", "Tax", "Total") wsInv.Visible = xlSheetVeryHidden End If '--- KeyStore sheet ------------------------------------------------ On Error Resume Next Set wsKey = ThisWorkbook.Worksheets("KeyStore") On Error GoTo 0 If wsKey Is Nothing Then Set wsKey = ThisWorkbook.Worksheets.Add(After:=ThisWorkbook.Sheets(ThisWorkbook.Sheets.Count)) wsKey.Name = "KeyStore" wsKey.Visible = xlSheetVeryHidden End If End Sub invoice manager for excel activation key