I want to lock a row in a table.

I want to create an stored procedure for this task

This table holds correlatives numbers and this what i want to do

1.) Lock the row
2.) Increment the correlative numer, Column1 = Column1 + 1
3.) Assign the number to an output parameter.
4.) Unlock the row

This will prevent duplicating a correlative number.

Can someone help me please.