Re: GetOpenFileName causes lock-up

From:

"Charlie Brown" <brownch@ip.cpmc.columbia.edu>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 18 Aug 2009 07:57:20 -0400

Message-ID:

<eTDCMs$HKHA.4708@TK2MSFTNGP03.phx.gbl>

HI.

Add another NULL, maybe. My docs say:

"The last string in the buffer must be terminated by two NULL =
characters."

You only have one in the example posted.

Charlie

"rik" <richard.dandoroff@scionresearch.com> wrote in message =
news:e2e7e41b-eeab-487a-966b-9b6ddc6075c7@v20g2000yqm.googlegroups.com...=

Hi,
having a problem where using GetOpenFileName crashes in debug mode
only.

To test it I grabbed an example off CodeGuru and found that if I
modify the filter it will cause my program to lockup
ofn.lpstrFilter = "Text Files (*.txt)\0*.txt\0All Files =

(*.*)\0*.*\0";

<< this works!!
but
ofn.lpstrFilter = "Text Files (*.txt)\0*.txi\0All Files =

(*.*)\0*.*\0";

<< Lock-up
or
ofn.lpstrFilter = ""; << Lock-up
or
ofn.lpstrFilter = "\0\0"; << Lock-up

What's up?

// ------------ code segment ------------------
OPENFILENAME ofn;
char szFileName[MAX_PATH] = "";
ZeroMemory(&ofn, sizeof(ofn));

ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = NULL;
ofn.lpstrFilter = "Text Files (*.txt)\0*.txi\0All Files =

(*.*)\0*.*\0";

ofn.lpstrFile = szFileName;
ofn.nMaxFile = MAX_PATH;
if(GetOpenFileName(&ofn))
{
// Do something usefull with the filename stored in szFileName
}
// ------------ code segment ------------------