vb6 使用指针来进行数组排序的问题

Public Declare Sub CopyMemory_Long Lib "kernel32" Alias "RtlMoveMemory" (Destination As Long, Source As Long, ByVal Length As Long)
Public Function Arr_SelectSort(arr, Optional fs As Long = 1)  '选择排序
    Dim n, i, Min, J, temp
    If Not IsArray(arr) Then Exit Function
    n = UBound(arr)
    For i = 0 To n - 1
        'Min = i
        CopyMemory_Long Min, i, 4
        For J = Min + 1 To n
            If arr(Min) > arr(J) And fs = 1 Then
                'Min = J
                CopyMemory_Long Min, J, 4
            ElseIf arr(Min) < arr(J) And fs = 0 Then
                'Min = J
                CopyMemory_Long Min, J, 4
            End If
        Next
        CopyMemory_Long temp, arr(Min), 4
        CopyMemory_Long arr(Min), arr(i), 4
        CopyMemory_Long arr(i), temp, 4
        '        temp = arr(Min)
        '        arr(Min) = arr(i)
        '        arr(i) = temp
    Next
    Arr_SelectSort = arr
End Function