EXTERN_C IMAGE_DOS_HEADER __ImageBase;
#define CURRENT_HINSTANCE ((HINSTANCE)&__ImageBase)

CImage image;
image.LoadFromResource(CURRENT_HINSTANCE, IDB_BG);
m_bg.Attach(image.Detach());
m_dc_bg.CreateCompatibleDC();
m_dc_bg.SelectBitmap(m_bg);