ChrW is just how Unicode characters are written with VBA. &H2713 refers to Unicode character Hex 2713 (i.e. ɱ). The things you need to understand about Windows fonts are:
• Not all fonts support Unicode characters; and
• Even with fonts that support Unicode characters, some fonts only support a subset of them.
Hence, there is no website that is likely to tell you which Unicode characters are available in Word, simply because that depends on which version on Windows/Mac OS you're using and which characters a given font supports. That said, if you find a website that lists Unicode characters, those are the same characters that a Windows or Mac OS that supports a given character code will display.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]