How do I stop my wine fermenting if I want it sweet or medium?

I have never brewed wine before I like my wine sweet/medium how do I stop it fermenting before it goes to dry?

You cant, at least as a home winemaker you cant.

let it ferment and stabilize, then add sugar to get the sweetness you want.

DoctorCAD said:

You cant, at least as a home winemaker you cant.

let it ferment and stabilize, then add sugar to get the sweetness you want.

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By stabilize, he means add potassium metabisulfite (also called kmeta or campden tablets) and potassium sorbate according to the directions on their packages. This will stun the yeast and stop them from reproducing. As you should have allowed you wine to clear first (a couple of rackings or by using a fining agent or filter) the remaining yeast shouldn't be able to metabolize the sugar you add to sweeten your wine to the level you desire.