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(m i d(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)
s el e c t Case m i d(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 s el e c t
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
s el e c t Case m i d(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 s el e c t
Next i
B_To_H ＝ H
End Function

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