A problem about a self-contained wx dll

[Jin Huang]

I'm working on a Windows XP box with wxWidget 2.8.4, VC8+SP1.

I have two sub-projects for an application. The first one is used for
creating a customized control (it is derived from wxFrame), and the
second one is a client to use this control. When both sub-projects are
built using WXUSINGDLL, and linked to wx*.dll (dynamic build of
wxWidget), there's no problem.

Now I want to the first sub-project can be used for some client which is
not based on wxWidget, such as glut application. So I re-build the first
sub-project without WXUSINGDLL, and linked to wx*.lib (static build of
wxWidget). Unfortunately, the output .dll file is not good for use. The
details is following:

If I do not add the following code to the first project (very similar to
the wiki page "Creating A DLL Of An Application"):
class wxDLLApp : public wxApp
{
     bool OnInit();
};

...

IMPLEMENT_APP_NO_MAIN(wxDLLApp)
 
DWORD WINAPI ThreadProc(LPVOID lpParameter)
{
    wxApp::SetInstance(new wxDLLApp());
    wxEntry(GetModuleHandle(NULL),NULL,NULL,SW_SHOW);
    return true;
}

BOOL APIENTRY DllMain(HINSTANCE hModule,
    DWORD  ul_reason_for_call,  LPVOID lpReserved)
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
        CreateThread(NULL,0,ThreadProc,NULL,0,NULL);
        break;
    case DLL_THREAD_ATTACH: break;
    case DLL_THREAD_DETACH: break;
    case DLL_PROCESS_DETACH:
        wxEntryCleanup();
        break;
    }
     return TRUE;
}

The application crashed at "wxTopLevelWindowMSW::CreateFrame" because
wxTheApp is NULL.

But if I follow the wiki page "Creating A DLL Of An Application", and
add above code to my program, I cannot close the control
(derived from wxFrame) by click the "X" at the title bar.


My question is what is the standard (or correct) way to create a dll
which supply a customized wxWidget control, and can be used outside a
wxWidget application?

Thank you very much!