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diff --git a/rfb/UserPasswdGetter.h b/rfb/UserPasswdGetter.h
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+/* Copyright (C) 2002-2003 RealVNC Ltd.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_USERPASSWDGETTER_H__
+#define __RFB_USERPASSWDGETTER_H__
+namespace rfb {
+  class UserPasswdGetter {
+  public:
+    // getUserPasswd gets the username and password.  This might
+    // involve a dialog, getpass(), etc.  The user buffer pointer
+    // can be null, in which case no user name will be retrieved.
+    // The caller MUST delete [] the result(s) iff the
+    // call succeeds (returns true), and ignore them if failed.
+    virtual bool getUserPasswd(char** user, char** password)=0;
+  };
+}
+#endif