CreateFile: Opening but not appending !!

[sjmolloy]

Hi all,
I am sure I am missing something really obvious here BUT..
I want to open file using CreateFile.
If it does not exist I want to create it and write to it...
If it already exists, I want to append to it.
To this end, I used
CreateFile(path,GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_ALWAYS,0,NULL);

(path is a variable name in my program).

This works the first time ie it creates the file but when I exit the application and then go back in again the CreateFile statement seems to wipe hte file contents....I NEED to append !!!

What should I be doing?
I can't find any previous threads on this one but I am sure I am not the first person who wanted to run this scenario ???

 

[Guest_imported]

Unless you're avoiding MFC, consider using CFile.
Construct with the CFile::modeCreate And CFile::modeNoTruncate flags.

 

[IonelBurtan]

1.Try to add the OPEN_EXISTING flag, too.
2.Use SetFilePointer API to set the file pointer at the end of the file the start writing in the file.

HTH, s-)

Blessed is he who in the name of justice and goodwill, sheperds the weak through the valley of darkness...

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