Simon Mourier's Blog - How does the VBA IsMissing function work under the hood?

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How does the VBA IsMissing function work under the hood?

Oct 10, 2021 See the question and my original answer on StackOverflow

The "missing" variant is a VARIANT with the vt member (VARTYPE) set to VT_ERROR and the scode member set to DISP_E_PARAMNOTFOUND (0x80020004).