数据处理问题！！！！

Question

inbuff: array[0..2047] of char;
Data:  array[0..2047] of byte;   ReadFile(hComm, inbuff,cs.cbInQue,nBytesRead,nil);   
   CopyMemory(@Data[0], @inbuff, SizeOf(inbuff));
现在我要知道Data数组中存了多少字节的数据，程序要怎么写啊？？？

Answer 1

inbuff: array[0..2047] of char;
Data:  array[0..2047] of byte;   ReadFile(hComm, inbuff,cs.cbInQue,nBytesRead,nil);   
   //CopyMemory(@Data[0], @inbuff, SizeOf(inbuff));///把这句去掉
readfile中nBytesRead即为实际大小