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StrSpn

int StrSpn(
    LPCTSTR psz,
    LPCTSTR pszSet
    );

Obtains the length of a substring within a string that consists entirely of characters contained in a specified buffer.

• Returns the length, in characters, of the matching string or zero if no match is found.

psz

Address of the string that is to be searched.

pszSet

Address of a null-terminated character buffer that contains the set of characters for which to search.

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