vb中字母排列组合输出函数

Option Explicit

Private Sub Command1_Click()
    Dim Num, I, J, Temp, Len1 As Long
    Dim FileNO As Long
    Dim Count As Long
    Dim str, strTemp, strArr() As String, Arr() As String
    '********************************************************************
    str = InputBox("请输入字符串，数字或者字母组成：", "提示")
    
    If str = "" Then Exit Sub
    
    '===by gary20130208
    'Len1 = Len(str): ReDim strArr(Len1)
    strArr() = Split(str, " ")
    Len1 = UBound(strArr) + 1
    
'    For I = 1 To Len1
'        strArr(I - 1) = Mid(str, I, 1)
'    Next
    '===
    
    '********************************************************************
    Count = 1
    For I = 2 To Len1
        Count = Count * I
    Next
    ReDim Arr(Count)
    '*********************************************************************
    Randomize
    For I = 0 To Count - 1
        '******************************************
Lab2:   strTemp = ""
        Num = 0
        Do While Num < Len1
Lab1:       Temp = Int(Rnd * Len1)
            If InStr(strTemp, CStr(Temp)) Then GoTo Lab1
            strTemp = strTemp & Temp
            Num = Num + 1
        Loop
        '******************************************
        For J = 0 To UBound(Arr)
            If Arr(J) = strTemp Then GoTo Lab2
        Next
        Arr(I) = strTemp
    Next
    '**********************************************************************
    FileNO = FreeFile
    Open "e:\字符组合.txt" For Output As #FileNO
    '**************************
    For I = 0 To Count - 1
        strTemp = ""
        For J = 1 To Len1
            strTemp = strTemp & strArr(CLng(Mid(Arr(I), J, 1))) & ","
        Next
        Print #FileNO, Left(strTemp, Len(strTemp) - 1)
    Next
    '**************************
    Close #FileNO
End Sub

这是网上找到的一段代码（vb 6.0版本），原来是算单个字符有多少种组合。我在这基础上做了下修改。

比如：A B C D E ，这样就总共有120种组合字符，然后输出到文本文件。