char * dst,
selector Selected internal value.
dst The buffer to receive string value.
len The length, in bytes, of dst.
Retrieves parts of a combined name into a string buffer, casting as required.
If the value is not combined, an empty string is copied. The output string is always null-terminated. If the buffer is too small, then the value is truncated. Up to len characters are copied to the given buffer, including the null terminator.