DWORD nReadByte ;
BYTE bBuf[BUF_SIZE] ;
OVERLAPPED ov = { 0, 0, 0, 0, NULL } ; // hEvent = NULL ;
HANDLE hFile = CreateFile ( ……, FILE_FLAG_OVERLAPPED, …… ) ;
ReadFile ( hFile, bBuf, sizeof(bBuf), &nReadByte, &ov ) ;
// 由于此时hEvent=NULL，所以同步对象为hFile,下面两句的效果一样
WaitForSingleObject ( hFile, INFINITE ) ;
//GetOverlappedResult ( hFile, &ov, &nRead, TRUE ) ;
DWORD nReadByte ;
BYTE bBuf1[BUF_SIZE],bBuf2[BUF_SIZE],bBuf3[BUF_SIZE] ;
OVERLAPPED ov1 = { 0, 0, 0, 0, NULL } ;
OVERLAPPED ov2 = { 0, 0, 0, 0, NULL } ;
OVERLAPPED ov3 = { 0, 0, 0, 0, NULL } ;
HANDLE hFile = CreateFile ( ……, FILE_FLAG_OVERLAPPED, …… ) ;
ReadFile ( hFile, bBuf1, sizeof(bBuf1), &nReadByte, &ov1 ) ;
ReadFile ( hFile, bBuf2, sizeof(bBuf2), &nReadByte, &ov2 ) ;
ReadFile ( hFile, bBuf3, sizeof(bBuf3), &nReadByte, &ov3 ) ;
//假设三个I/O处理的时间比较长，到这里还没有结束
GetOverlappedResult ( hFile, &ov1, &nRead, TRUE ) ;
DWORD nReadByte ;
BYTE bBuf1[BUF_SIZE],bBuf2[BUF_SIZE],bBuf3[BUF_SIZE] ;
HANDLE hEvent1 = CreateEvent ( NULL, FALSE, FALSE, NULL ) ;
HANDLE hEvent2 = CreateEvent ( NULL, FALSE, FALSE, NULL ) ;
HANDLE hEvent3 = CreateEvent ( NULL, FALSE, FALSE, NULL ) ;
OVERLAPPED ov1 = { 0, 0, 0, 0, hEvent1 } ;
OVERLAPPED ov2 = { 0, 0, 0, 0, hEvent2 } ;
OVERLAPPED ov3 = { 0, 0, 0, 0, hEvent3 } ;
HANDLE hFile = CreateFile ( ……, FILE_FLAG_OVERLAPPED, …… ) ;
ReadFile ( hFile, bBuf1, sizeof(bBuf1), &nReadByte, &ov1 ) ;
ReadFile ( hFile, bBuf2, sizeof(bBuf2), &nReadByte, &ov2 ) ;
ReadFile ( hFile, bBuf3, sizeof(bBuf3), &nReadByte, &ov3 ) ;
//此时3个I/O操作的同步对象分别为hEvent1,hEvent2,hEvent3
GetOverlappedResult ( hFile, &ov1, &nRead, TRUE ) ;
[注意]APP应用上架合规检测服务，协助应用顺利上架！
学习。
