You don't need remoting. You need to handle the DragEnter and DragDrop event
from the control and decide whether the clipboard contains a format of data
you can handle.

In DragEnter, check the clipboard data for formats such as bitmaps or paths
to image files. if the test is positive then allow the drop. When the drop
happens use the data in whatever way your application needs.

For example, this code enables file dropping...

protected override void OnDragEnter(DragEventArgs e)

{

if (e.Data.GetDataPresent(DataFormats.Text))

{

string path =(string) e.Data.GetData("Text");

if(File.Exists(path))

{

e.Effect = DragDropEffects.Copy;

}

else

{

e.Effect=DragDropEffects.None;

}

}

else

{

e.Effect = DragDropEffects.None;

}

base.OnDragEnter(e);

}

This should get you started on thedrop.

 protected override void OnDragDrop(DragEventArgs e)
 {

  if(e.Data.GetDataPresent("Text"))
  {
   string path=(string)e.Data.GetData("Text");
   //load an image from a file??
  }
  Invalidate();

  base.OnDragDrop(e);

 }