Private Sub Command1_Click()
Dim s1 As String, s2 As String
Dim i As Integer, x As Integer
Const code="0123456789ABCDEF"
s1=Text1.Text
s2=""
Do While Len(s1) Mod 4<>0
s1="0"+s1
Loop
x=0
i=1
Do While i<=Len(s1)
x=x*2+Val(Mid(s1,i,1))
i=i+1
If Then ‘①
s2=s2+Mid(code,x+1,1)
‘②
End If
Loop
Text2.Text=s2
End Sub