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Connection definition parameters
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Database=someDB
User_Name=sa
Password=some_password
AllowReconnect=True
Server=some_server
MetaDefSchema=dbo
MetaDefCatalog=some_catalog
DriverID=MSSQL2000
Pooled=True
Encrypt=No
Name=DEV2K

   
with ADConnection do
  begin
    Close;
    Params.Clear;
    Params.Add('Database=some_db');
    Params.Add('User_Name=sa');
    Params.Add('Password=some_password');
    Params.Add('AllowReconnect=True');
    Params.Add('Server=some_server');
    Params.Add('MetaDefSchema=dbo');
    Params.Add('MetaDefCatalog=some_catalog');
    Params.Add('DriverID=MSSQL2000');
    Params.Add('Pooled=True');
    Params.Add('Encrypt=No');
    Params.Add('Name=SomeConnName');
    Open;
  end;