void CExampleMDIApp::OnFileOpen() 
{
	HANDLE hDialog = OSDInit(true, "MDITEST", 0, 0, 0, OFN_HIDEREADONLY | 
                                                      OFN_FILEMUSTEXIST|
                                                      OFN_ALLOWMULTISELECT, 0, AfxGetMainWnd()->m_hWnd);
	if(hDialog)
	{
		OSDRET osResult=OSDDoModal(hDialog, 0);
		if(osResult==OSD_OK) 
		{
			int nCount = 0;
			OSD_POSITION position=0;
			OSDGetStartPosition(hDialog,&position);

			while(position)
			{

				char szFileBuff[MAX_PATH]={0};
				INT nSize=sizeof(szFileBuff);
				HBITMAP hBitmap=NULL;

				OSDGetNextPathNameAndFileHBITMAP(hDialog,&position,szFileBuff,&nSize,&hBitmap);

				CExampleMDIDoc *pDocument=(CExampleMDIDoc*)OpenDocumentFile(szFileBuff);
				if(hBitmap && pDocument)
				{
					pDocument->m_hBitmap=hBitmap;
					{
						POSITION ps=pDocument->GetFirstViewPosition();
						CScrollView *pView=(CScrollView*)pDocument->GetNextView(ps);
						if(pView)
						{
							CBitmap *pBitmap=CBitmap::FromHandle(pDocument->m_hBitmap);
							BITMAP bm={0};
							pBitmap->GetBitmap(&bm);

							CSize sizeTotal;
							sizeTotal.cx = bm.bmWidth;
							sizeTotal.cy = bm.bmHeight;

							pView->SetScrollSizes(MM_TEXT,sizeTotal);
						}
					}
				}
			}
		}
		OSDRelease(hDialog);
	}
}