Set ms = CreateObject("ADODB.Stream") ms.Type = 1 ms.Open ms.Write imgBytes ms.Position = 0
Public Function EncodeAlphanumeric(ByVal sData As String) As Byte() ' Alphanumeric mode (0-9, A-Z, space, $%*+-./:) Dim i As Long, j As Long, c As Integer Dim buffer() As Byte, tempVal As Integer ReDim buffer(0 To Len(sData) * 2) ' Over-estimate For i = 1 To Len(sData) Step 2 c = CharToValue(Mid(sData, i, 1)) If i + 1 <= Len(sData) Then tempVal = c * 45 + CharToValue(Mid(sData, i + 1, 1)) buffer(j) = tempVal \ 256 buffer(j + 1) = tempVal Mod 256 j = j + 2 Else buffer(j) = c j = j + 1 End If Next ReDim Preserve buffer(0 To j - 1) EncodeAlphanumeric = buffer vb6 qr code generator source code
' Load byte array into a PictureBox Set ms = CreateObject("ADODB.Stream") ms.Type = 1 ' adTypeBinary ms.Open ms.Write imgBytes ms.Position = 0 Set ms = CreateObject("ADODB
Private Sub DrawFinderPattern(ByRef m() As Integer, ByVal startX As Integer, ByVal startY As Integer) Dim x As Integer, y As Integer ' Outer square (7x7 black) For x = 0 To 6 For y = 0 To 6 m(startY + y, startX + x) = 1 Next y Next x ' Inner white square (5x5) For x = 1 To 5 For y = 1 To 5 m(startY + y, startX + x) = 0 Next y Next x ' Inner black square (3x3) For x = 2 To 4 For y = 2 To 4 m(startY + y, startX + x) = 1 Next y Next x End Sub $%*+-./:) Dim i As Long
For developers who prefer not to ship external DLLs or OCX files, the most efficient route is using a single-file module like mdQRCodegen.bas
Leverage .NET assemblies (ZXing.Net, QRCoder) exposed as COM objects. VB6 can instantiate these via CreateObject :