Subj : Re: Opening a file that is being created with a VB App.
To   : borland.public.cpp.borlandcpp
From : Bob Gonder
Date : Sat Jun 05 2004 10:32 am

>Sebastian Ledesma wrote:
>> Hello:
>> 
>> I need to open a file that is being created by a Visual Basic App
>> (something like this: Open sFile2 For Binary As FileGrab2 ), i tried several
>> parameters with CreateFile without success (   hf=CreateFile(filename,
>> FILE_READ_DATA, FILE_SHARE_WRITE, lpSecurityAttributes,
>>         OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );  ), any hints will be
>> appreciatted.

Biggest hint is to read (and understand) the fine manual.
CreateFile( filename, GENERIC_READ,
   FILE_SHARE_READ|FILE_SHARE_WRITE, /*Allow others full use */
   NULL, /* Almost always NULL unless you have special needs*/
>>         OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );

Should also OR one of the FILE_FLAG_*  features so Windows can
optimise the reads. In particular, either FILE_FLAG_SEQUENTIAL_SCAN or
FILE_FLAG_RANDOM_ACCESS. Read the manual to figure out which is best
for your file.

FILE_ATTRIBUTE_NORMAL|FILE_FLAG_RANDOM_ACCESS

.