now you can set optional ogl version through the first 2 parameters

MshViewer/main.cpp

@@ -9,6 +9,18 @@
 
 int main(int argc, char** argv)
 {
+	OpenGLController* scene = NULL;
+
+	if (argc == 3)
+	{
+		int major = atoi(argv[1]);
+		int minor = atoi(argv[2]);
+		scene = OpenGLController::getInstance(major, minor);
+	}
+	else
+		scene = OpenGLController::getInstance();
+
+
 	goto openGL;
 
 	try {
@@ -26,8 +38,6 @@ int main(int argc, char** argv)
 
 openGL:
 
-	OpenGLController *scene = OpenGLController::getInstance();
-
 	scene->loadMsh("..\\Release\\Msh\\cubeTrans.msh");
 
 	do {