Public Function D_To_B(ByVal Dec As Long) As String
Do
D_To_B = Dec Mod 2 & D_To_B
Dec = Dec \ 2
Loop While Dec
End Function

Public Function B_To_D(ByVal Bin As String) As Integer
Dim i As Long
For i = 1 To Len(Bin)
B_To_D = B_To_D * 2 + Val(Mid(Bin, i, 1))
Next i
End Function

Public Function H_To_B(ByVal Hex As String) As String
Dim i As Long
Dim B As String

Hex = UCase(Hex)
For i = 1 To Len(Hex)
Select Case Mid(Hex, i, 1)
Case "0": B = B & "0000"
Case "1": B = B & "0001"
Case "2": B = B & "0010"
Case "3": B = B & "0011"
Case "4": B = B & "0100"
Case "5": B = B & "0101"
Case "6": B = B & "0110"
Case "7": B = B & "0111"
Case "8": B = B & "1000"
Case "9": B = B & "1001"
Case "A": B = B & "1010"
Case "B": B = B & "1011"
Case "C": B = B & "1100"
Case "D": B = B & "1101"
Case "E": B = B & "1110"
Case "F": B = B & "1111"
End Select
Next i
While Left(B, 1) = "0"
B = Right(B, Len(B) - 1)
Wend
H_To_B = B
End Function

Public Function B_To_H(ByVal Bin As String) As String
Dim i As Long
Dim H As String
If Len(Bin) Mod 4 <> 0 Then
Bin = String(4 - Len(Bin) Mod 4, "0") & Bin
End If

For i = 1 To Len(Bin) Step 4
Select Case Mid(Bin, i, 4)
Case "0000": H = H & "0"
Case "0001": H = H & "1"
Case "0010": H = H & "2"
Case "0011": H = H & "3"
Case "0100": H = H & "4"
Case "0101": H = H & "5"
Case "0110": H = H & "6"
Case "0111": H = H & "7"
Case "1000": H = H & "8"
Case "1001": H = H & "9"
Case "1010": H = H & "A"
Case "1011": H = H & "B"
Case "1100": H = H & "C"
Case "1101": H = H & "D"
Case "1110": H = H & "E"
Case "1111": H = H & "F"
End Select
Next i
B_To_H = H
End Function