keyboard - Are there UTF-8 respectively unicodes for dead keys?

Question

I work with an application called Lightworks. It supports different keyboard languages, by using configuration files where the key command is represented by the corresponding Hex UTF-8 code. For instance:

German dead key ′ (keycode 192) is defined as 0x00B4 Hex UTF-8 code
German dead key ^ (keycode 160) is defined as 0x005E Hex UTF-8 code

Now the important thing is that until recently, it was sufficient to press those keys once in order to get the related command working. With the latest version though, one has to press the related key twice.

Hence I am wondering if there are different Hex codes for dead keys, in order to make them work again when pressed once only.

Or in another way, why is it sufficient at the following website, to press the keys mentioned above only once, in order to get the result?

https://keycode.info/

Answer 1

等待大神解答