public FormSecretary_AddOrRemoveLecture(int _id, string _password)
        {
            InitializeComponent();

            string        department;
            List <string> coursesProperties = new List <string>();
            List <int>    coursesID         = new List <int>();
            List <int>    lecturesID        = new List <int>();

            id                = _id;
            password          = _password;
            department        = SQLFunctions.getUsersDepartment(id);
            coursesProperties = SQLFunctions.findCoursePropertiesByDepartment(department);
            for (int i = 1; i < coursesProperties.Count; i += 9)
            {
                coursesID.Add(Convert.ToInt32(coursesProperties[i]));
            }

            for (int i = 0; i < coursesID.Count; i++)
            {
                lecturesID = SQLFunctions.findLecturesIDsForCourse(coursesID[i]);
                for (int j = 0; j < lecturesID.Count; j++)
                {
                    lectureIDS.Add(lecturesID[j]);
                    comboBox_Lectures.Items.Add(SQLFunctions.covertLectureIDtoLectureName(lecturesID[j]) + " " + lecturesID[j]);
                }
            }

            comboBox_Lectures.Items.Add("All");
            this.AcceptButton                = button_accept;
            textBox_StartTime.MaxLength      = 2;
            textBox_EndTime.MaxLength        = 2;
            textBox_day.MaxLength            = 2;
            textBox_month.MaxLength          = 2;
            textBox_year.MaxLength           = 2;
            comboBox_AddRemove.DropDownStyle = ComboBoxStyle.DropDownList;
            comboBox_Lectures.DropDownStyle  = ComboBoxStyle.DropDownList;
        }