MS SQL Server 2008 Restart command

Hello.

I need to call a command or API function to stop and then restart SQL Server 2008 each other day. Before, I had MSSQL Server 2000 and used the following commands from within my program:

net stop SQLServerAgent
net stop MSSQLServer

then

net start MSSQLServer
net start SQLServerAgent

But with SQL Server 2008 they don´t work, it seems the services are named different than in previous versions (for example the SQL 2000 version).

Note:

I'm using SQL Server 2008 Express Edition for the testing and I'm not sure if the service is called the same in the "regular" (not Express) edition.

Any idea how to do this ?

Regards.