C / C++ / MFC

Malli_S wrote:

The way out for this is use dynamic loading of that DLL.

Chris Losinger wrote:

DLL?

[Delegates]      [Virtual Desktop]      [Tray Me !]

-Malli...!

Malli_S wrote:

But it's a third party library. He might not have the source code for that.

#include <windows.h>
#include <stdio.h>

void main()
{
	HANDLE hFile;
	HANDLE hAppend;
	DWORD  dwBytesRead, dwBytesWritten, dwPos;
	BYTE   buff[4096];
	char DataBuffer[] = "This is some test data to write to the file.";
	DWORD dwBytesToWrite = (DWORD)strlen(DataBuffer);
 

	BOOL bErrorFlag = FALSE;

  // Open the existing file.

  hFile = CreateFile(TEXT("one.txt"), // open One.txt
            GENERIC_READ,             // open for reading
            0,                        // do not share
            NULL,                     // no security
            CREATE_ALWAYS,            // existing file only
            FILE_ATTRIBUTE_NORMAL,    // normal file
            NULL);                    // no attr. template

  if (hFile == INVALID_HANDLE_VALUE)
  {

     printf("Could not open One.txt."); 
     return;
  }
    bErrorFlag = WriteFile( 
                    hFile,           // open file handle
                    DataBuffer,      // start of data to write
                    dwBytesToWrite,  // number of bytes to write
                    &dwBytesWritten, // number of bytes that were written
                    NULL);            // no overlapped structure

  // Open the existing file, or if the file does not exist,
  // create a new file.

  hAppend = CreateFile(TEXT("two.txt"), // open Two.txt
              FILE_APPEND_DATA,         // open for writing
              FILE_SHARE_READ,          // allow multiple readers
              NULL,                     // no security
              CREATE_ALWAYS,              // open or create
              FILE_ATTRIBUTE_NORMAL,    // normal file
              NULL);                    // no attr. template

  if (hAppend == INVALID_HANDLE_VALUE)
  {
     printf("Could not open Two.txt."); 
     return;
  }

  // Append the first file to the end of the second file.
  // Lock the second file to prevent another process from
  // accessing it while writing to it. Unlock the
  // file when writing is complete.

  while (ReadFile(hFile, buff, sizeof(buff), &dwBytesRead, NULL)
      && dwBytesRead > 0)
    {
    dwPos = SetFilePointer(hAppend, 0, NULL, FILE_END);
    LockFile(hAppend, dwPos, 0, dwBytesRead, 0);
    WriteFile(hAppend, buff, dwBytesRead, &dwBytesWritten, NULL);
    UnlockFile(hAppend, dwPos, 0, dwBytesRead, 0);
    }

  // Close both files.

  CloseHandle(hFile);
  CloseHandle(hAppend);
}