Re: Passing a string to CreateFile()

From:
Gerry Hickman <gerry666uk@newsgroup.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Mon, 07 May 2007 18:35:00 +0100
Message-ID:
<OWwgL4MkHHA.3816@TK2MSFTNGP02.phx.gbl>
Thanks Arman,

The solution you posted is exactly what I was looking for, the use of
LPCTSTR in main() and then being able to pass it to OpenDrive(). Great!

Arman Sahakyan wrote:

"Gerry Hickman" wrote:

Hi,

I have the following code:

const TCHAR* const filename = _T("\\\\.\\PhysicalDrive2");
HANDLE hDevice = CreateFile(filename,
    GENERIC_READ,
    FILE_SHARE_READ | FILE_SHARE_WRITE,
    NULL, OPEN_EXISTING, 0, NULL);

This seems to work, but the first line is messy, is there a more simple
way to write it?


You mean content? Perheps not so messy, I think :) This is what you have to
have.

I eventually want to allocate the 'filename' variable in main() and pass
it to a function which will use CreateFile(), what's the best way to set
that up?


You've already allocated it. What is missing is the function to pass the
string to.
It's simple;

HANDLE OpenDrive(LPCTSTR szDrive)
{
 return CreateFile(szDrive,
    GENERIC_READ,
  FILE_SHARE_READ | FILE_SHARE_WRITE,
  NULL, OPEN_EXISTING, 0, NULL);
}

// then inside main;

LPCTSTR filename = _T("\\\\.\\PhysicalDrive2");

HANDLE hDrive = OpenDrive(filename);


--
Gerry Hickman (London UK)

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