+QueryExtension(dpy, errorb, event)
+ return Bool
+ param dpy DisplayPointer in value
+ param errorb int out reference
+ param event int out reference
+
+GetCurrentContext()
+ return GLXContext
+
+GetCurrentDrawable()
+ return GLXDrawable
+
+GetClientString(dpy, name)
+ return GLXstring
+ param dpy DisplayPointer in value
+ param name int in value