Public Interface IEmployeesMainForm
    Inherits IActivityMainForm
    ''' <summary>
    ''' Gets all the employees.
    ''' </summary>
    ''' <returns></returns>
    Function GetAllEmployees() As ICollection(Of IEmployee)

    ''' <summary>
    ''' Selects an employee.
    ''' </summary>
    ''' <param name="employeeIndex"></param>
    ''' <param name="employee"></param>
    Sub SelectEmployee(employeeIndex As Integer, employee As IEmployee)

    ''' <summary>
    ''' Removes the selection of the current employee.
    ''' </summary>
    Sub DeselectEmployee(employeeIndex As Integer)

    ''' <summary>
    ''' Gets the selected employee for this index. This function still works if no employee was selected yet.
    ''' </summary>
    ''' <param name="employeeIndex"></param>
    ''' <returns>The selected employee if there is one. 'Nothing' if there wasn't one.</returns>
    Function GetSelectedEmployee(employeeIndex As Integer) As IEmployee

    Sub StartActivity(employeeIndex As integer)
    Sub FinishActivity(employeeIndex As integer)
    Sub StopActivity(employeeIndex As integer)
End Interface