title: Is it possible to attach an event to specific user behavior in designer
body: <p>I'm developing a <strong>user control consisting of two components</strong> to be used in WinForms. In order to make it convenient for user to adjust the width of both components, I want to implement the following functionality: <strong>when user drag the left boundary to resize the control, the left component changes its size, and the right component resizes when the right boundary is dragged.</strong><br />
  Since both Resize and Move events are fired when the left boundary is dragged, I cannot simply achieve it by adding listeners to the event handlers, thus I'm wondering if there's a way to attach an event to specific user behavior in the designer, like dragging the boundary to resize or move the control.<br />
  <strong>If it proves impossible, any solution to solve the problem will also be of great help!</strong> Appreciations in advance.</p>