Developing on a 4K Monitor - problem with DPI Scaling

Question

Development Environment:
Visual Studio 2013 Update 4
Windows 8.1 latest SP
1st screen: 4K, 3840x3260
2nd screen: 1920x1200
Situation: I'm developing a WinForms Application since many years.  Originally, my development environment was started on normal screens. Now, the main screen was exchanged by a 4K.
Problem: Whenever I design a dialog, or change an existing one, the resulting dialog is much too big on a normal FullHD display. It seems that Visual Studio cannot correctly the DPI scaling;
end the forms designer even "destroys" existing code once you open a dialog.
Question: What's the best way to develop WinForms desktop applications on a high-resolution display?

Answer 1

So, I messed around a lot more with switchresX, and discovered you can create any retina resolution by making a custom 'scaled' resolution with double the dimensions in each direction. For example, 1440p turns into 5120x2880.
The caveat here is that you can't set the actual screen resolution. So, for my rMBP, 1440p gets scaled to 1080p and looks like garbage. I'm fairly convinced that this is something that's determined by the driver though. I attached the monitor (Asus p287q) to a Mac Pro with an nvidia graphics card and using the nvidia web drivers (not the default ones that come with mac os x), and the 1440p on 4K HiDPI mode is available and looking great (60hz too!)
I haven't tried this yet, but maybe installing the nvidia web drivers will fix the rMBP resolution as well. Thing is, the Macbook Pro 13 has Intel graphics, right? Not sure if Intel offers alternative mac drivers, but if they do it's probably worth a try.