Ok here goes,
You make a new connection and execute it see below:
datasourcemyprocedure is Data Source
if hopenconnection( your connectionvar) then
Hcanseldeclaration(dsMyProcedure)
IF HExecuteSQLQuery(dsMyProcedure,"MyConnection", hQueryWithoutCorrection, "dbo.sp_yourstored procedure @o_RKey out") THEN
//.o_RKey out is the variable you are gettting out of you sp
the key = dsMyProcedure.o_RKey out
hclose(dsMyprocedure)
Hcloseconnection(your connectionvar
else
end