Pointer to structure

[cNewbie]

Let's say I have a function to which I have passed a
pointer to a structure.
How do I express the address of a member of that
structucture in the function using this pointer?

For example I have this function who uses sscanf to
copy a string to a member of a structure.
&parse.value does not work because the function does
not know the structure parse, it knows about a pointer
containing the address of the structure parse. Thanks in advance for all the help.

 
static int parse_sscanf( char * in_str, struct parse_s
* parse_struct )
{
    int result;
 
    result = sscanf(in_str, "%f %s", &parse.value,
&parse.name);
    if (result == EOF)
    {
        return FALSE;
    }
    else
    {
        return TRUE
    }
}