Public Function PixelToHex(cntrl As Control, xoff As Long, yoff As Long, Width As Long, Height As Long) As String

Dim B() As Byte
Dim hdc As Long
Dim xi As Long
Dim exp As Long
Dim x As Long
Dim Y As Long
Dim cnt As Long
Dim pix As Long
Dim hx$
Dim hexx$

    ' die Breite, width, wird hier in Pixel angegeben, nicht in Byte.

    ReDim B(Width * Height)
    hdc = cntrl.hdc
    cnt = 0

    For Y = 0 To Height - 1
        For x = 0 To Width - 1 Step 8
            cnt = cnt + 1
            For xi = 0 To 7
                'pix = GetPixel(hdc, xoff + x + xi, yoff + y)
                pix = cntrl.Point(xoff + x + xi, yoff + Y)
                If pix = 0 Then
                    exp = 7 - xi
                    B(cnt) = B(cnt) Or 2 ^ exp
                End If
            Next xi
        Next x
    Next Y

   'Bis hierhin in Byte
   'Nun nach Hex Konvertieren
   
   For x = 1 To cnt
        hx$ = Hex$(B(x))
        If Len(hx$) = 1 Then
            hx$ = "0" + hx$
        End If
        hexx$ = hexx$ + hx$
    Next x
    PixelToHex = hexx$

End Function

Dim H$

    H$ = PixelToHex(Picture1, 0, 0, 240, 128)