vb 的signed数据类型向unsigned数据类型的转化算法
Function UnsingedAdd (ByVal Start As Long, ByVal Incr As Long) As Long
Const SignBit As Long = &H80000000
UnsignedAdd=(Start Xor SignBit) + Incr Xor SignBit
End Function
谁能看懂?ByVal Start As Long, ByVal Incr As Long这两个参数是怎么用的,能举个例子说一下么?