Very simple GUI app with ATL

[Vorskla]

My window application disappears just only this window appears. By another words it doesn't run the PreTranslate message cycle. It's my program's code:

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

class CMainWindow : public CWindowImpl < CMainWindow, CWindow, CFrameWinTraits >
{
public:
	CMainWindow()
	{
		Create(NULL, CWindow::rcDefault, _T("My ATL Window"));
		ShowWindow(SW_SHOWNORMAL);
	}
	virtual ~CMainWindow()
	{
		if (m_hWnd) DestroyWindow();
	}
	BEGIN_MSG_MAP(CMainWindow)
		MESSAGE_HANDLER(WM_PAINT, OnPaint)
	END_MSG_MAP()
public:
	LRESULT CMainWindow::OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{return 0;}
}theApp;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	return 0;
}

Please, help me. What do I do wrong?