MSKLC under Windows 10: Create custom keyboard layout which supports IME (input method) for Chinese and combined input in Spanish

This question is originally posted by me in Microsoft Community at:

https://answers.microsoft.com/en-us/windows/forum/windows_10-other_settings/msklc-under-windows-10-create-custom-keyboard/8c5a7137-d575-4247-8ab3-b4dd1e5fb437?tm=1495318604424

In summary: I have created a custom keyboard layout with Microsoft Keyboard Layout Creator 1.4 in Windows 10, it is working but only partially. It cannot:

• combine two keystrokes into one to type a "combined letter", e.g, "¨"+"u" = "ü". It should not exist in Chinese but I want to achieve this.

• type Chinese pinyin and Chinese punctuation. In MS pinyin IME, I can press shift to switch between Chinese pinyin mode and English mode. Under pinyin mode I can convert letters into pinyin and thus get Chinese characters, but my layout lacks this. And, if I press "," in Microsoft Pinyin in pinyin mode, it should give me "，"(full length comma), but this layout is not able to do this.

I am thinking about two ways to solve this:

• Substitute Microsoft Pinyin's keyboard layout to my layout(replace the English part of MS Pinyin with my layout)

• Copy the pinyin part of MS pinyin to my layout.

So, how can I solve this?