MFC App closes on startup - c++

Question

Trying to run a simple MFC App but closes because the program terminates, assuming I need to run the dialog box in a seperate thread but can't work out how.
Here's the code so far:
CWinApp theApp;
using namespace std;
int main(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;
HMODULE hModule = ::GetModuleHandle(NULL);
theApp.InitApplication();
theApp.InitInstance();
theApp.Run();
AfxWinTerm();
if (hModule != NULL)
{
// initialize MFC and print and error on failure
if (!AfxWinInit(hModule, NULL, ::GetCommandLine(), 0))
{
// TODO: change error code to suit your needs
_tprintf(_T("Fatal Error: MFC initialization failed\n"));
nRetCode = 1;
}
else
{
MyDialog *mdlg = new MyDialog();
mdlg->Create( IDD_MDLG, theApp.m_pMainWnd);
mdlg->ShowWindow( true );
}
}
else
{
// TODO: change error code to suit your needs
_tprintf(_T("Fatal Error: GetModuleHandle failed\n"));
nRetCode = 1;
}
return nRetCode;
}
There must be something simple I can do to keep the program from terminating, just not sure how?

Answer 1

Instead of calling:
mdlg->ShowWindow( true );
you should do:
mdlg->DoModal();
Also, I dont think you need Create. If you want to stay with modeless dialog, then you should create message loop before returning from main - something like here http://en.wikipedia.org/wiki/Message_loop_in_Microsoft_Windows

Answer 2

As far as I can see you created a Win32 Console Application and try to add a GUI to it? You should only do that if you really need the console. If not, then better create a new project, select the MFC Application template and choose dialog based application. The wizard will create all you need.
BTW, your
MyDialog *mdlg = new MyDialog();
mdlg->Create( IDD_MDLG, theApp.m_pMainWnd);
mdlg->ShowWindow( true );
should better have been:
MyDialog mdlg;
mdlg.DoModal();
No need for new in your case, so just allocate the object on the stack. And DoModal does what you want.
In my Win32 Console Application with MFC support I was able to show a dialog. But in my wizard generated code these lines were not present, so maybe you should delete them:
theApp.InitApplication();
theApp.InitInstance();
theApp.Run();
AfxWinTerm();