主题：求教个代码转换问题

 应该是填充占位符的意思

Dim text_length As Integer = 88
Dim num As Integer = 32
Dim a As Integer = num - text_length Mod num

If a = 0 Then a = num
Dim ch As String = chr(a)
Dim s As String = ""
For Index As Integer = 0 To a-1
    s &= ch
Next
Return Encoding.UTF8.GetBytes(s)