/**
Returns a numeric ID that is equivalent to the string ID used in an XML
resource. If an unknown @a str_id is requested (i.e. other than wxID_XXX
or integer), a new record is created which associates the given string with
a number. If @a value_if_not_found is @c wxID_NONE, the number is obtained via
/**
Returns a numeric ID that is equivalent to the string ID used in an XML
resource. If an unknown @a str_id is requested (i.e. other than wxID_XXX
or integer), a new record is created which associates the given string with
a number. If @a value_if_not_found is @c wxID_NONE, the number is obtained via