Add qmake additional arguments in Qt Visual Studio add-in

Open pro files with Visual Studio
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My project has to be built using several additional arguments (CONFIG+=...) and I cannot load correctly the *.pro file (and compile the code) successfully if I "just click" in "Open Qt Project File" in the add-in inside Microsoft Visual Studio, because it calls directly to the command "qmake -tp vc", without giving to the user the opportunity to add additional arguments. If I do this from the command line adding all my extras, the conversion from pro to vcproj works like a charm.

What I want to ask you is to add a dialog or similar to add these qmake additional arguments (like Qt Creator in the Projects panel).

Thanks in advance.