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一条晚起的虫 2009-09-06
//同步方式
BYTE *lpBuffer;
DWORD nNumberOfBytesToWrite = 100; //需要写入100个数据
DWORD NumberOfBytesWritten; //返回实际写入的数据字节数
int rtn = WriteFile(hFile, lpBuffer, nNumberOfBytesToWrite, &NumberOfBytesWritten, NULL);
if(!rtn)
{
DWORD dwError = GetLastError(); //返回具体错误代码
}
else
{
TRACE("%d", NumberOfBytesWritten);
}
BYTE *lpBuffer;
DWORD nNumberOfBytesToWrite = 100; //需要写入100个数据
DWORD NumberOfBytesWritten; //返回实际写入的数据字节数
int rtn = WriteFile(hFile, lpBuffer, nNumberOfBytesToWrite, &NumberOfBytesWritten, NULL);
if(!rtn)
{
DWORD dwError = GetLastError(); //返回具体错误代码
}
else
{
TRACE("%d", NumberOfBytesWritten);
}
tanweijian2009 2009-08-20
楼上的朋友能给个简单的例子吗，谢谢啦
stjay 2009-08-20
BOOL WriteFile(
HANDLE hFile, // 文件句柄
LPCVOID lpBuffer, // 数据缓存区指针
DWORD nNumberOfBytesToWrite, // 你要写的字节数
LPDWORD lpNumberOfBytesWritten, // 用于保存实际写入字节数的存储区域的指针
LPOVERLAPPED lpOverlapped // OVERLAPPED结构体指针
);
阻塞模式：
*lpNumberOfBytesWritten就是发送字节
异步模式：
用，重叠IO
BOOL GetOverlappedResult(
HANDLE hFile,
LPOVERLAPPED lpOverlapped,
LPDWORD lpNumberOfBytesTransferred,
BOOL bWait
);
*lpNumberOfBytesTransferred为传送的字节
或完成端口
BOOL GetQueuedCompletionStatus(
HANDLE CompletionPort,
LPDWORD lpNumberOfBytes,
PULONG_PTR lpCompletionKey,
LPOVERLAPPED* lpOverlapped,
DWORD dwMilliseconds
);
*lpNumberOfBytes为传送字节
HANDLE hFile, // 文件句柄
LPCVOID lpBuffer, // 数据缓存区指针
DWORD nNumberOfBytesToWrite, // 你要写的字节数
LPDWORD lpNumberOfBytesWritten, // 用于保存实际写入字节数的存储区域的指针
LPOVERLAPPED lpOverlapped // OVERLAPPED结构体指针
);
阻塞模式：
*lpNumberOfBytesWritten就是发送字节
异步模式：
用，重叠IO
BOOL GetOverlappedResult(
HANDLE hFile,
LPOVERLAPPED lpOverlapped,
LPDWORD lpNumberOfBytesTransferred,
BOOL bWait
);
*lpNumberOfBytesTransferred为传送的字节
或完成端口
BOOL GetQueuedCompletionStatus(
HANDLE CompletionPort,
LPDWORD lpNumberOfBytes,
PULONG_PTR lpCompletionKey,
LPOVERLAPPED* lpOverlapped,
DWORD dwMilliseconds
);
*lpNumberOfBytes为传送字节
tanweijian2009 2009-08-20
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