app_fatal center_window cleanup_thread_id DDErrMsg DirErrorDlg DiskFreeDlg DrawDlg DSErrMsg ErrDlg FileErrDlg FreeDlg GetErrorStr InsertCDDlg MsgBox sz_error_buf terminating TextDlg TraceLastError TriggerBreak

center_window() void center_window ( HWND  hDlg )