Creating and Destroying a Window in CWinThread Derived Class

Hello,

(Using VC++ 6.0)

I am extremely frustrated with this and have burned many hours and still no
solution.

This should be simple.

I have created a sample app that does the following:

1) Creates a CWinThread derived class from Class Wizard called SeperateThread.
2) Creates a modeless dialog box on thread initialization
3) Destroys it on ExitInstance() SeperateThread.

Problem: ExitInstance() in cannot destroy the window I created just above
on thread InitInstance().

Code Snippets:

CTestThreaddingJunkDlg.h
CSeperateThread ThreadA; declared in the base .h file

In CTestThreaddingJunkDlg.cpp:
void CTestThreaddingJunkDlg::OnButton1()
{
    ThreadA.CreateThread();
}

void CTestThreaddingJunkDlg::OnButton2()
{
    ThreadA.ExitInstance();
}

In SeperateThread.h:
CDudeWindow * Duder;

In SeperateThread.cpp:
BOOL CSeperateThread::InitInstance()
{
    Duder = new CDudeWindow ();

    Duder->Create(CDudeWindow::IDD);

    Duder->ShowWindow(SW_SHOW);

    // works fine the first time around!!!!!

    return TRUE;
}

int CSeperateThread::ExitInstance()
{
    Duder->DestroyWindow(); // always crashes here and never closes window!
    delete Duder;

    return CWinThread::ExitInstance();
}

I am going to need to do another CreateThread() on ThreadA later (after it
is deleted or handle set to null), but if I can't uninitialize or exit and
destroy the window, there is no hope for recreating ThreadA later.

Any suggestions?

Thanks,

Rob