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<a name="sec-basics-gobj-and-wrap"></a>Mixing C and C++ APIs</h2></div></div></div>
<p>You can use C APIs which do not yet have convenient C++ interfaces. It is generally not a problem to use C APIs from C++, and <span class="application">gtkmm</span> helps by providing access to the underlying C object, and providing an easy way to create a C++ wrapper object from a C object, provided that the C API is also based on the GObject system.</p>
<p>To use a <span class="application">gtkmm</span> instance with a C function that requires a C GObject instance, use the <code class="function">gobj()</code> function to obtain a pointer to the underlying GObject instance. For instance</p>
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Gtk::Button* button = new Gtk::Button("example");
gtk_button_do_something_new(button->gobj());
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<p>To obtain a <span class="application">gtkmm</span> instance from a C GObject instance, use the Glib::wrap() function. For instance</p>
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GtkButton* cbutton = get_a_button();
Gtk::Button* button = Glib::wrap(cbutton);
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