加密解密文件.frm

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VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "加密/解密文件"
   ClientHeight    =   5880
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5445
   LinkTopic       =   "Form1"
   ScaleHeight     =   5880
   ScaleWidth      =   5445
   StartUpPosition =   3  '窗口缺省
   Begin VB.CheckBox Check1 
      Caption         =   "显示全部文件"
      Height          =   255
      Left            =   3540
      TabIndex        =   8
      Top             =   2940
      Width           =   1635
   End
   Begin VB.CommandButton Command2 
      Caption         =   "退出"
      Height          =   315
      Left            =   3840
      TabIndex        =   7
      Top             =   1860
      Width           =   1155
   End
   Begin VB.CommandButton Command1 
      Caption         =   "加密/解密"
      Height          =   315
      Left            =   3840
      TabIndex        =   6
      Top             =   1260
      Width           =   1155
   End
   Begin VB.FileListBox File1 
      Height          =   1170
      Left            =   120
      Pattern         =   "*.txt"
      TabIndex        =   4
      Top             =   2040
      Width           =   3195
   End
   Begin VB.TextBox Text2 
      Height          =   270
      Left            =   4140
      TabIndex        =   3
      Top             =   180
      Width           =   1155
   End
   Begin VB.TextBox Text1 
      Height          =   2415
      Left            =   60
      MultiLine       =   -1  'True
      ScrollBars      =   3  'Both
      TabIndex        =   2
      Top             =   3360
      Width           =   5235
   End
   Begin VB.DirListBox Dir1 
      Height          =   1350
      Left            =   120
      TabIndex        =   1
      Top             =   540
      Width           =   3195
   End
   Begin VB.DriveListBox Drive1 
      Height          =   300
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   3195
   End
   Begin VB.Label Label1 
      Caption         =   "密码："
      Height          =   195
      Left            =   3480
      TabIndex        =   5
      Top             =   240
      Width           =   615
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim i As Long
Dim DataBuff() As Byte
Dim AddBuff() As Byte
Dim password() As Byte
Dim FileName As String

Private Sub Check1_Click()
    If Check1.Value Then
        File1.Pattern = "*.*"
    Else
        File1.Pattern = "*.txt"
    End If
End Sub

Private Sub Command1_Click()
    Dim j As Integer
    Dim password_len As Integer
    password_len = Len(Text2.Text)
    ReDim password(password_len) As Byte
    For i = 0 To password_len - 1
        password(i) = Asc(Mid(Text2.Text, i + 1, 1))
    Next i
    If FileName = "" Then Exit Sub
    Open FileName For Binary As #1
    ReDim DataBuff(LOF(1))
    Get #1, , DataBuff
    Close #1
    ReDim AddBuff(UBound(DataBuff)) As Byte
    For i = 0 To UBound(DataBuff)
        If j >= password_len Then
            j = 0
        Else
            j = j + 1
        End If
        AddBuff(i) = DataBuff(i) Xor password(j)
    Next i
    Open FileName For Binary As #1
    Put #1, , AddBuff
    Close #1
    Text1.Text = StrConv(AddBuff, vbUnicode)
    Text2.Text = ""
End Sub

Private Sub Command2_Click()
    End
End Sub

Private Sub Dir1_Change()
    File1.Path = Dir1.Path
End Sub

Private Sub Drive1_Change()
    On Error GoTo a0
    Dir1.Path = Drive1.Drive
    Exit Sub
a0:
    If Err Then MsgBox (Error(Err))
    
End Sub

Private Sub File1_Click()
    FileName = Dir1.Path + "\" + File1.FileName
    If FileName = "" Then Exit Sub
    Open FileName For Binary As #1
    ReDim DataBuff(LOF(1))
    Get #1, , DataBuff
    Close #1
    Text1.Text = StrConv(DataBuff, vbUnicode)
    MsgBox TypeName(StrConv(DataBuff, vbUnicode))
End Sub