vbcoding.txt

ceaser转换文本加密技术

BTW, here's a little doo-dad that I threw together that moves the ascii value of each 
character up (encode) or down (decode), with a default change of 40.  
So, for example, chr(233) might become chr(21), or chr(74) might become chr(114).  
Anyone who knows what they're doing could easily decode it, but at least it's not legible 
if you open the file in Notepad, etc. Try it!  

Syntax is:  encode(mytext, [range]) and decode(mytext, [range]). 

-Jon Davis; [e-mail]

Public Function Encode(Data As String, Optional Depth As Integer) As String
Dim TempChar As String
Dim TempAsc As Integer
Dim NewData As String
Dim vChar as Integer

For vChar = 1 To  Len(Data)
	TempChar = Mid$(Data, vChar, 1)
        TempAsc = Asc(TempChar)
        If Depth = 0 Then Depth = 40 'DEFAULT DEPTH            
        If Depth > 254 Then Depth = 254

        TempAsc = TempAsc + Depth
        If TempAsc > 255 Then TempAsc = TempAsc - 255
        TempChar = Chr(TempAsc)
        NewData = NewData & TempChar
Next vChar    
Encode = NewData

End Function
	
Public Function Decode(Data As String, Optional Depth As Integer) As String
Dim TempChar As String
Dim TempAsc As Integer
Dim NewData As String
Dim vChar as Integer

For vChar = 1 To Len(Data)
	TempChar = Mid$(Data, vChar, 1)
        TempAsc = Asc(TempChar)
        If Depth = 0 Then Depth = 40 'DEFAULT DEPTH
        If Depth > 254 Then Depth = 254
	TempAsc = TempAsc - Depth
        If TempAsc < 0 Then TempAsc = TempAsc + 255        
        TempChar = Chr(TempAsc)
        NewData = NewData & TempChar
Next vChar
Decode = NewData

End Function