title: Add custom design time command to WinForms control
body: <p>I have a custom WinForms control (inherits from control, i.e. without user interface jsut as Timer) to which I want to add a custom command add design time. </p>
  
  <p>This could be similar to the "right click and choose 'Edit Items...'" of a menu.</p>
  
  <p>Is this posisble? How?</p>
  
  <p>Also, could you recommend some general reading (online) about improving the design time experience of custom controls? </p>