Stored Procedure For Serach Routine

I need to write a stored procedure for seach routine.

 

ALTER PROCEDURE dbo.Search_Select

@FirstName VARCHAR(50) = NULL,

@LastName VARCHAR(100) = NULL,

@Address VARCHAR(50) = NULL,

AS

DECLARE @Sql varchar(500)

DECLARE @Where varchar(500)

SET @Sql = 'SELECT * FROM employee WHERE '

 

HOW DO I WRITE  SET@Where = ????  Taking care of all input parameters.

SET @Where = '(@FirstName LIKE ''' + @FirstName + '% AND'')' +  '(@LastName LIKE ''' + @LastName + '% AND'')' .........

Is it right?