Improve x64 build

![R97RttU](https://f.cloud.github.com/assets/4129781/371874/a676c7c2-a349-11e2-92e5-4b342fa7a0f0.png)

Makes the x64 build display 64-bit values.
Fixes a couple of crashes.
Fixes injection - don't inject from 32-bit to 64-bit process and vice versa.

Also fixes a bug with the interface screwing up when the window is minimized and it gets a WM_SIZE message.

I'm new to GitHub, so I'm not sure whether I should have done two separate pull requests for this.