Math Input Panel / Mathematischer Eingabebereich Design

[Mi4uric3]

Hey Epvp,

Microsoft Windows 7 has a little program called "Math Input Panel" (DE: Mathematischer Eingabebereich).
It has quite some interesting design and I wonder how they do that.

Screenshots:

 Spoiler

Do you have any idea how to do this..?

Thanks in advance,
Mi4uric3

[MrSm!th]

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