unisize
Determines the size in bytes (not characters) the current string occupies including the 2-byte NULL terminator
#include <unicode.h>
N_EXTERN_LIBRARY(size_t) unisize (
const unicode N_FAR *s);
uses netwin32 Function unisize (s : const unicode ) : size_t;
Returns the number of bytes in the string pointed to by the s parameter including the terminating NULL character.
For sample code, see Section 3.27, Example: unisize.