title: How can I add items to my self created control
body: <p>I have created a user control in WinForms, which I would like to select in another application from the toolbox.</p>
  <p>My question now:
  How can I get it to add additional elements to the properties window of this custom control, e.g. labels which are then drawn in the design window.</p>
  <p>For example:  with the ListView I can create additional ListViewItems in the design window and they will be displayed directly.</p>
  <p>I would like to have exactly this feature for my self created Control, with the difference that they are not ListViewItems but e.g. labels.</p>
  <p>Here is a ScreenShot, which should clarify what I mean exactly:</p>
  <p><a href="https://i.stack.imgur.com/3OYk7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3OYk7.png" alt=" " /></a></p>
  <p>in this picture you can see how I selected the ListView and when I click on Items I get a new window where I can add ListViewItems to this control.</p>
  <p>I would have liked to have this feature for my self created control.</p>