drag and drop

[vbzero]

private void rtbInterop_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
		{
			if(e.Data.GetDataPresent(DataFormats.Text))
			{
				rtbInterop.Text = e.Data.GetData(DataFormats.Text).ToString();
			}
			else if(e.Data.GetDataPresent(DataFormats.FileDrop))
			{
				rtbInterop.Text = e.Data.GetData(DataFormats.FileDrop).ToString(); // Does not work
			}
		}

This enables me to copy or move any text from another
application into this RichTextBox.
The second thing is: to drag a file into the textbox and
then display the content of that file in textform in the
RichTextBox.

How could I do this?

thx!