1) CString szMyString = _T("00010AC2"); TCHAR *szStop; HWND hWnd = (HWND)_tcstol(szMyString, &szStop,16); 2) HWND NotepadWnd =::FindWindow(”Notepad”,NULL); ::ShowWindow(NotepadWnd,SW_MINIMIZE); CString find; find.Format(”%d”,NotepadWnd); HWND hConvertedHwnd= (HWND)_ttol(find); ::ShowWindow(hConvertedHwnd,SW_MAXIMIZE~~~)