Winform application with custom drag and drop controls

I've created a few custom controls in c#.

Is there any example which shows the below tasks. Searched google and did my home work before asking this here.

1. 
   

   The winform should work like C# IDE. When the user opens the application, the custom controls should be available in the left panel and the user should be able to drag the required control to the right side panel.

   
   


2. 
   

   The user should be able to use a custom control n number of times (like we drag and drop a button or a label control while developing winform applications)

   
   


3. 
   

   I'd like to join the controls using lines by adding a bubble to it and connect the line to another control. For example if i have custom control A and custom control B, I want to draw a line from A to B to join them. (similar to objects in Visio).

   
   

Any references / examples? I know how to create a control and use it, but the application focuses on the user to be able select the control and use it at run time. Thanks in advance.