256# * BytReceived(I) + BytReceived(I + 1)

Dim strCharacter As String   '定义字符变量
 Dim BytReceived() As Byte    '定义接收数组
 Dim I As Integer             '定义临时变量
 BytReceived() = MSComm.Input  '将输入内容赋与字节数组
 .................

strCharacter = 256# * BytReceived(I) + BytReceived(I + 1)

 .................


请问各位大侠，上面最后一句代码是啥意思?
在VB代码中，数字后面加“#”号表示什么？