There are other packages besides MFC that do GUI stuff, but I don't think they plug-in to Visual Studio. I must confess, I have never been a fan of MFC. I find it ugly and painful, so I can't really recommend it.
Qt has a designer, as does GTK. I haven't used the Qt designer, but the GTK one works well. It can be found here: http://glade.gnome.org/ You can get glade for Windows here: http://gladewin32.sourceforge.net/
It can be hassle to set these up, though.
Honestly, while I like C++ a lot, writing GUIs for Windows is not where it excels. I would recommend that you look at C# instead. You can still interface with C++ if you need to, but it makes writing Windows GUIs so much nicer.