Since your writing a Windows API app in c++, it's all you at that point. If you want easy interface construction, try C#.
A simpler way to add controls to a window api c++ app is to use an *.rc file to setup a dialog window as your parent window. Now you can use the MSVS gui to design your window with the needed controls.
This example might help you.
http://www.codeproject.com/Articles/227831/A-dialog-based-Win32-C-program

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