in c++/cli, i announce duty an 'out' parameter?

i have duty parses twine twin strings. c# i announce this:

void parsequery(string toparse, out twine search, out twine sort)
{
    ...
}

and i'd this:

string searchoutput, sortoutput;
parsequery(userinput, out searchoutput, out sortoutput);

the tide digest finished c++/cli. i've tried

using system::runtime::interopservices;

...

void parsequery(string ^ toparse, [out] string^ search, [out] string^ sort)
{
    ...
}

but i this:

string ^ searchoutput, ^ sortoutput;
parsequery(userinput, [out] searchoutput, [out] sortoutput);

i compiler error, i this:

string ^ searchoutput, ^ sortoutput;
parsequery(userinput, searchoutput, sortoutput);

then i an blunder during runtime. should i announce function?

code1