Hi,

I derived a class from CFileDialog with a template dialog,I would like to
open picture files with preview. It can work well in EXE project,but the
file dialog cann't be seen in extended DLL.
What't the reason?

Thanks in advance!

Robbery

Probably your best bet is to trace through it with the de{*filter*}. If you're
talking about an extension DLL, the dialog's resource ID must be unique.
That is, the EXE and any other extension DLLs cannot use that same ID for
their own dialogs.

--
Doug Harrison
Microsoft MVP - Visual C++

Hi,Doug

Thank you,
I am sure the dialog resource's  ID is unique.I try to trace it with
de{*filter*},I think it should popup the dialog which I hoped when it run here:
if (m_bOpenFileDialog)
  nResult = ::GetOpenFileName(&m_ofn);  // it can run here
 else
  nResult = ::GetSaveFileName(&m_ofn);

but no dialog here

It really bothers me.

So GetOpenFileName succeeds but GetSaveFileName fails, with exactly the same
input? What is the value of nResult? If it's zero, call CommDlgExtendedError
and see what it returns. If that doesn't help, you're going to have to take
a close look at the m_ofn contents and try simplifying. Once you get it to a
working state, you'll know that the things you changed were involved in
breaking it in the first place. I don't know if this will help you, but see
this message for a description of a fairly common problem with VC6's MFC,
and attempts to use the Win2K-style file dialogs:

http://www.*-*-*.com/

--
Doug Harrison
Microsoft MVP - Visual C++