Yes, you have to subscribe to that event:
subscribe to the event[
^]
In your form's constructor, you could add,
dgrid.CellValueChanged += new DataGridViewCellEventHandler(dgrid_CellValueChanged);
Also, if you're using Visual Studio, in the Design View of your form/window, go to the Properties tab, switch to "Events" (instead of properties) and double click on the event you need. And all the wiring up of events will automatically be done for you.