diff --git a/EGkGdbConst.h b/EGkGdbConst.h
index 0b30e2e..7dd0c6b 100644
--- a/EGkGdbConst.h
+++ b/EGkGdbConst.h
@@ -77,4 +77,7 @@ enum BBoxFlag { BBF_STANDARD = 0,
 const std::string GDB_SI_SOURCE = "!SOU" ;
 const std::string GDB_SI_BASE = "!BAS" ;
 const std::string GDB_SI_LIST = "!LST" ;
-const std::string GDB_SI_COPY = "!COP" ;
\ No newline at end of file
+const std::string GDB_SI_COPY = "!COP" ;
+const std::string GDB_SI_MGRPONLY = "!MGO" ;
+const std::string GDB_SI_DRAWMODE = "!DRM" ;
+       
\ No newline at end of file