>I can't for the life of me see how to start a drag operation in C#. All the Google results I found seem to be for dropping something from Windows into a C# app. What if I just want to drag a user control across the form?

Did you try:

DoDragDrop( myControl, DragDropEffects.Move )

or in control's events:

DoDragDrop( this, DragDropEffects.Move )

Cetin