i am unable to understand tis function,plz help
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BOOL WriteFile( HANDLE hFile, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped ); BOOL ReadFile( HANDLE hFile, LPVOID lpBuffer, DWORD nNumberOfBytesToRead, LPDWORD lpNumberOfBytesRead, LPOVERLAPPED lpOverlapped );
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BOOL WriteFile( HANDLE hFile, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped ); BOOL ReadFile( HANDLE hFile, LPVOID lpBuffer, DWORD nNumberOfBytesToRead, LPDWORD lpNumberOfBytesRead, LPOVERLAPPED lpOverlapped );
It's understandable from Parameter names check MSDN CHeck MSDN[^] SaRath.
_"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"
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BOOL WriteFile( HANDLE hFile, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped ); BOOL ReadFile( HANDLE hFile, LPVOID lpBuffer, DWORD nNumberOfBytesToRead, LPDWORD lpNumberOfBytesRead, LPOVERLAPPED lpOverlapped );
WriteFile is for write to file and ReadFile is for read from file see
CString WriteToFile; HANDLE hFile; DWORD dwRead; WriteToFile="This is a test"; hFile=CreateFile((LPCTSTR)"c:\\test.txt",GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_NEW,FILE_ATTRIBUTE_NORMAL,NULL); DWORD m_dwSize=WriteToFile.GetLength(); BOOL bResult=WriteFile(hFile,(LPCTSTR)WriteToFile,m_dwSize,&dwRead,NULL); CloseHandle(hFile); CString strRead=""; DWORD dwReads=0; hFile=CreateFile((LPCTSTR)"c:\\test.txt",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL); DWORD dwBufferSize=GetFileSize(hFile,NULL); bResult=ReadFile(hFile,strRead.GetBuffer(dwBufferSize),dwBufferSize,&dwReads,NULL); MessageBox(strRead); CloseHandle(hFile); /*LPTSTR lpt33; lpt33=(LPTSTR)LocalAlloc(LPTR,dwBufferSize); LocalFree(lpt33);*/And see MSDN_**
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