Shift states

Microsoft made 6 Shift states. To make things a bit more clear, You use 2 of them every day - the ordinary one, when you just press 1 key at a time, and the second one is when you press Shift key and type.

1. Just press any* key. For example, pressing "H" key types "h".
   
2. Press any key while holding Shift depressed. For example, while holding Shift key depressed, press "H". It will produce "H" on an ordinary keyboard layout.
   
3. Press any key while holding AltGr (right Alt key), or Ctrl + Alt (both Control and Alt key) depressed. For example, while holding AltGr depressed, press "h". It can produce some text symbol. Usually it won't because Microsoft haven't set any symbols for those keys on ordinary keyboard layouts. You can set it to be any Unicode text symbol that you want, if you'll follow my steps.
   
4. Press any key while holding Shift + Alt Gr, or Shift + Ctrl + Alt depressed. It's a good idea to setup small umlaut letters on AltGr and capital versions here.
   
5. Press any key while holding Ctrl (Control key) depressed. This one may be problematic, because of the keyboard shotcuts, like Ctrl + F, Ctrl + U, etc. But the following chooser works fine.
6. Press any key while holding Shift + Ctrl depressed. Same story, as with previous three Shift states. I'm sure you didn't knew about these four additional, because they aren't set in default layouts on Windows. I didn't knew about them neither. About 10 years of experience with MS Windows and no notice of them. Fantastic! =)

* In our case, when I say "any", I really mean any key from the `, 0 to 9, a to z and [ to / keyboard section. And, also, a dot from Numeric keypad. You can see the keys I meant on the picture.

Make your own keyboard layout

I'll explain what keyboard layout means first, and then tell you how to customize it - make it what you want it to be.

What?

Keyboard layout (functional) - is the keyboard-meaning associations arrangement of all the keys of a keyboard, determined in software (Windows in our case). Because of these associations, when you press buttons on your keyboard, you get some corresponding text and things happening. Like getting some text typed in, etc.

Layout creator

Microsoft corp. has released a very good tool for making custom layuts. We are going to use it in this method. Install Microsoft Keyboard Layout Creator from Microsoft.com. Don't be afraid, it's really simple in use. And I'm going to show you what you should do with it.
Here is a step-by-step guide with explanations.

Step 1: Open

Open Keyboard Layout Creator.
Choose File ➢ Load Existing Keyboard..
Choose keyboard layout you use most. I'm choosing United States layout in here. On picture below, you can see my self-made layouts are also listed on my computer as existing. "US Custom" and "US Custom2" are my modified version of US keyboard layout. You won't see them on your computer. Until you make them. ;)

I divided this article in 3 parts, for better structure. Here are the next 2 parts. Don't worry, they are smaller. ;)

1. Steps 2 and 3: Understand layouts and Assign symbols.
2. Steps 4 and 5: Build, setup and turn it on.