Code completion in kdevelop 3.4

[Sbaush]

Hi, i'm using kdevelop 3.4 in my kubuntu.
I would use the code completion for external libraries, in particular for
the wxwidget
In my project i include some functions of the wx:

#include <wx/wx.h>
#include <wx/string.h>
#include <wx/ffile.h>

So i can declare a wxString and use it in my app!

wxString String;

Now i would digit
String.
and see al the methods availabe for wxString.
i tried to modify the Project - Project options - C++ specific - Code
completion but without success...
What can i do to have this feature?
Goodbye and thaks for reading!
Sbaush
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