Source:
Http://blog.9cbs.net/hansbj/archive/2004/12/10/211907.aspx
How Delphi calls the SQL stored procedure and get the result
AdoStoredProc1.Close;
AdocedProc1.ProcedureName: = 'sp_thchl';
AdoStoredProc1.Parameters.clear;
AdoStoredProc1.Parameters.createParameter ('out', ftinteger, pdoutput, 1, 1);
AdoStoredProc1.execproc;
Edit1.text: = adoStoredProc1.Parameters [0] .value;