Re: can't bring "single instance" tray app to foreground

I'm using the single instance class found at
<http://www.codeproject.com/threads/simplesingleinstanceapp.asp>.

When the first instance of my app receives the notification that
another instance was launched, it shows a dialog displaying the args
received. The problem is that this dialog does not become the
frontmost/active window.

I'm doing something like this:

void CTrayApp::OnSecondInstance(UINT, LPARAM)
{
 m_pMainWnd->SetForegroundWindow();
 AfxMessageBox(GetSecondInstanceCmdLine(), IDOK);
}

which throws up the dialog but it's behind the active window
(generally the windows explorer file browser).

I guess it makes sense that SetForegroundWindow() isn't doing
anything since (because this is a trap app) the main window
was hidden.

void CTrayApp::InitInstance()
{
 ...
 m_pMainWnd->ShowWindow(SW_HIDE);
}

Now if, in OnSecondInstance(), I do ShowWindow(SW_RESTORE), my app
does come to the foreground, but I have a big blank main window
there now.

Any hints, or is what I'm trying to do even possible? Normally
when my app is launched with args, it needs to import a file and
that requires interaction with the user. That interaction involves
a dialog, so there is a window besides the main window that I can
bring to the foreground, but currently I use a modal dialog (using
DoModal()). If I used a modeless dialog could I just bring that
to the foreground after it is created? I'd rather stick to the
modal dialog for simplicity.