Subj : Re: Problems with API WriteFile
To   : borland.public.cpp.borlandcpp
From : Jeff Baker
Date : Wed Apr 28 2004 03:52 am


"Bob Gonder" <notbg@notmindspring.invalid> wrote in message
news:ulkr809cstl9625218lmqrimf5ugiooqhf@4ax.com...
> Jeff Baker wrote:
>
> >Can someone please point out why this will not work correctly. I think
the
> >WriteFile function is called incorrectly but I can't figure out why. I
thank
> >you in advance.
>
> >   int send_stream[]={4,0,0,0,4,0};
> >   DWORD nNumberOfBytesToWrite;
> >   LPDWORD lpNumberOfBytesWritten;
>
> Wrong. Use
> DWORD NumberOfBytesWritten;
>
> >   nNumberOfBytesToWrite = 6;
> >   lpNumberOfBytesWritten = 0;
>
> Wrong, is same as lpNumberOfBytesWritten = NULL;
> Use
>   NumberOfBytesWritten = 0;
>
>
>WriteFile(hCom,send_stream,nNumberOfBytesToWrite,lpNumberOfBytesWritten,NUL
L);
>
> Use &NumberOfBytesWritten
>
> >   if (nNumberOfBytesToWrite != *lpNumberOfBytesWritten) ProgramError();
> Use
>    if (nNumberOfBytesToWrite != NumberOfBytesWritten) ProgramError();
>
>

This is my first attempt at writting a Win32 API program and I thank you for
your help.

- Jeff

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