AtlHelloWorld.cpp

#define _ATL_APARTMENT_THREADED

#include <atlbase.h>
#include <atlwin.h>

class CMainWnd :
    public CWindowImpl<CMainWnd, CWindow, CFrameWinTraits>
{
public:
    static LPCTSTR GetWndCaption()
    {
        return _T("Hello World");
    }

    BEGIN_MSG_MAP(CMainWnd)
    END_MSG_MAP()
    
    void OnFinalMessage(_In_ HWND /*hWnd*/) override
    {
        PostQuitMessage(0);
    }
};

class CModule : public ATL::CAtlExeModuleT< CModule >
{
public:
    HRESULT PreMessageLoop(_In_ int nShowCmd) throw()
    {
        //AtlInitCommonControls(0xFFFF);

        CMainWnd* mainwnd = new CMainWnd();
        if (!mainwnd->Create(NULL))
            return AtlHresultFromWin32(GetLastError());
        mainwnd->ShowWindow(nShowCmd);

        HRESULT hr = __super::PreMessageLoop(nShowCmd);
        if (FAILED(hr))
            return hr;

        return S_OK;
    }
};

CModule _AtlModule;

int APIENTRY _tWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPTSTR lpCmdLine, _In_ int nShowCmd)
{
    return _AtlModule.WinMain(nShowCmd);
}