VB 二进制，八进制，十进制，十六进制转换

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

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