Help! The File Can't be Append?

[virusx1984]

I saw in the MQL4 Document:

• If FILE_READ is specified, an attempt is made to open an existing file. If a file does not exist, file opening fails, a new file is not created.
• FILE_READ|FILE_WRITE – a new file is created if the file with the specified name does not exist.
• FILE_WRITE –  the file is created again with a zero size.

so the file that exists can't be append? 

[Carl Schreiber]

Well this is the intended behaviour. What can you read from a file that does not exist?

[William Roeder]

virusx1984: so the file that exists can't be append?	Of course you can; open read/write and seek to the end.

[virusx1984]

WHRoeder:

virusx1984: so the file that exists can't be append?	Of course you can; open read/write and seek to the end.

Thank you! How to seek to the end? Could you give me an example?

[William Roeder]

virusx1984:  How to seek to the end? Could you give me an example?

1. RTFM List of MQL4 Functions - MQL4 Documentation -> File Functions - MQL4 Documentation -> FileSeek - MQL4 Documentation
2. RTFB MQL4 Tutorial -> File Operations - Standard Functions - MQL4 Tutorial -> FileSeek - MQL4 Documentation
   

3.       int      CREATE   = FILE_WRITE|FILE_TXT|FILE_ANSI;
         int      APPEND   = FILE_READ|CREATE;
         string   fileName = WindowExpertName() + ".DBG";
         HANDLE   handle   = FileOpen(fileName, APPEND);
         if(handle != INVALID_HANDLE){
            FileSeek(handle, 0, SEEK_END);
            FileWrite(handle, s);
            FileClose(handle);
   

   Is that so hard?