Debug Assertion failed in dialog box,Visual c++ - c++

Question

I am trying to add a bitmap image(.bmp) to background of a main Dialog in visual studio c++. I created a close button which normally works well but after putting background image and when I press close button I get this error:
Debug assertion failed.
File:c:\program files(x86)\microsoft visual
studio12.0\vc\atlmfc\include\atlwin.h
Line:3604 Expression:m_hWnd==0
For information on how your program can cause an assertion failure,
see the Visual C++ documantation an asserts.
Abort Retry Ignore
For loading bitmap image a class defined.
Header:
#if !defined(AFX_PICTUREWINDOW_H__44323373_9E89_11D3_A393_00C0DFC59237__INCLUDED_)
#define AFX_PICTUREWINDOW_H__44323373_9E89_11D3_A393_00C0DFC59237__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include <atlbase.h>
#include <atlwin.h>
class CPictureWindow : public CWindowImpl<CPictureWindow>
{
public:
typedef enum HandlerTypeEnum
{
ClientPaint = WM_PAINT,
BackGroundPaint = WM_ERASEBKGND
} HandlerTypeEnum;
CPictureWindow()
{
m_nMessageHandler = ClientPaint;
};
virtual ~CPictureWindow()
{
};
BEGIN_MSG_MAP(CPictureWindow)
MESSAGE_HANDLER(WM_PAINT, OnPaint)
MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBkGnd)
END_MSG_MAP()
virtual BOOL Load(LPCTSTR szFileName)
{
BOOL bResult = FALSE;
Close();
if (szFileName)
{
OFSTRUCT of;
HANDLE hFile = NULL;;
if ((hFile = (HANDLE)OpenFile((LPCSTR)szFileName, &of, OF_READ | OF_SHARE_COMPAT)) != (HANDLE)HFILE_ERROR)
{
DWORD dwHighWord = NULL, dwSizeLow = GetFileSize(hFile, &dwHighWord);
DWORD dwFileSize = dwSizeLow;
HRESULT hResult = NULL;
if (HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, dwFileSize))
if (void* pvData = GlobalLock(hGlobal))
{
DWORD dwReadBytes = NULL;
BOOL bRead = ReadFile(hFile, pvData, dwFileSize, &dwReadBytes, NULL);
GlobalUnlock(hGlobal);
if (bRead)
{
CComPtr<IStream> spStream;
_ASSERTE(dwFileSize == dwReadBytes);
if (SUCCEEDED(CreateStreamOnHGlobal(hGlobal, TRUE, &spStream)))
if (SUCCEEDED(hResult = OleLoadPicture(spStream, 0, FALSE, IID_IPicture, (void**)&m_spPicture)))
bResult = TRUE;
}
}
CloseHandle(hFile);
}
}
Invalidate();
return bResult;
}
HandlerTypeEnum m_nMessageHandler;
protected:
inline virtual BOOL IsHandlerMessage(UINT uMsg)
{
return m_nMessageHandler == (HandlerTypeEnum)uMsg;
}
void PutPicture(IPicture* pPicture, HDC hDC, RECT rPicture)
{
OLE_XSIZE_HIMETRIC nWidth = NULL; OLE_YSIZE_HIMETRIC nHeight = NULL;
pPicture->get_Width(&nWidth); pPicture->get_Height(&nHeight);
pPicture->Render(hDC, rPicture.left, rPicture.top, rPicture.right - rPicture.left, rPicture.bottom - rPicture.top, 0, nHeight, nWidth, -nHeight, NULL);
};
LRESULT OnEraseBkGnd(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (IsHandlerMessage(uMsg))
{
if (m_spPicture)
{
BeginPaint(NULL);
RECT r; GetClientRect(&r);
HDC hDC = GetDC();
HWND hWndChild = GetWindow(GW_CHILD);
while (::IsWindow(hWndChild))
{
if (::IsWindowVisible(hWndChild))
{
RECT rChild; ::GetWindowRect(hWndChild, &rChild);
ScreenToClient(&rChild);
ExcludeClipRect(hDC, rChild.left, rChild.top, rChild.right, rChild.bottom);
}
hWndChild = ::GetWindow(hWndChild, GW_HWNDNEXT);
}
PutPicture(m_spPicture, hDC, r);
ReleaseDC(hDC);
EndPaint(NULL);
return TRUE;
}
}
bHandled = FALSE;
return FALSE;
};
LRESULT OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (IsHandlerMessage(uMsg))
{
if (m_spPicture)
{
BeginPaint(NULL);
RECT r; GetClientRect(&r);
HDC hDC = GetDC();
PutPicture(m_spPicture, hDC, r);
ReleaseDC(hDC);
EndPaint(NULL);
}
}
bHandled = FALSE;
return NULL;
};
void Close()
{
m_spPicture = NULL;
}
//Attributes
CComPtr<IPicture> m_spPicture;
};
#endif
and in DoDataExchange of .Cpp file:
objPictureWindow.SubclassWindow(m_hWnd);
objPictureWindow.m_nMessageHandler = CPictureWindow::BackGroundPaint;
objPictureWindow.Load((LPCTSTR)"D:\\bitmap2.bmp");
Size of this bitmap is about 2Mb. However I resized it to 500Kb but again I had the same error after pressing the close button to close this dialog.
By following this error compiler shows this line to me:
template <class TBase, class TWinTraits>
BOOL CWindowImplBaseT< TBase, TWinTraits >::SubclassWindow(_In_ HWND hWnd)
{
ATLASSUME(m_hWnd == NULL);
ATLASSERT(::IsWindow(hWnd));