void CExampleSDIApp::OnFileOpen()
{
	HANDLE hDialog = OSDInit(true, "SDITEST", 0, 0, 0, 0, 0, AfxGetMainWnd()->m_hWnd);
	if(hDialog)
	{
		OSDRET osResult=OSDDoModal(hDialog, 0);
		if(osResult==OSD_OK) 
		{
			char szFileBuff[MAX_PATH]={0};
			int nSize=sizeof(szFileBuff);
			OSDGetPathName(hDialog, szFileBuff,&nSize);

			if(CFileFind().FindFile(szFileBuff))
			{
				CExampleSDIDoc *pDocument=(CExampleSDIDoc*)OpenDocumentFile(szFileBuff);
				if(pDocument)
				{
					OSDGetFileHBITMAP(hDialog, &pDocument->m_hBitmap);

					if(pDocument->m_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);
	}
}