有一个1MB的管道：
if (0 == CreatePipe(&hRead,&hWrite,0,1024*1024))
{
printf("CreatePipe failed\n");
return success;
}
一次发送4000个字节（bytesReq = 4000）
while ((bytesReq = (FileSize - offset)) != 0)
{
//Send data to Decoder.cpp thread, converting to human readable CSV
if ( (0 == WriteFile(hWrite,
readBuff,
bytesReq,
&bytesWritten,
0) ) ||
(bytesWritten != bytesReq) )
{
printf("WriteFile failed error = %d\n",GetLastError());
break;
}
// Would like to update a status box with the amount of data in the pipe.
I would like to know if and how often it is getting full....
}
4个字节一次在另一个线程中读取，在管道的另一端。