It doesn't matter what control you call the DoDragDrop method on?

Question

I'm curious, it doesn't matter which control I call the DoDragDrop method in a Windows Forms application.

I have a form with two PictureBox controls. It can be dragged and the other has the AllowsDrop property set to true.

The MouseDown event handler for a dragged PictureBox looks like this:

    private void dragPictureBox_MouseDown(object sender, MouseEventArgs e)
    {
        if (sender is PictureBox)
        {
            var pictureBox = (PictureBox) sender;
            var effect = pictureBox.DoDragDrop(
                pictureBox.Image, DragDropEffects.All);
            MessageBox.Show("Drag ended in a " + effect);
        }
    }

But instead of calling DoDragDrop on the pictureBox, it seems to me that I can use any control, for example, Form itself

var effect = this.DoDragDrop(pictureBox.Image, DragDropEffects.All);

or even

var effect = label1.DoDragDrop(pictureBox.Image, DragDropEffects.All);

Is there any difference in which control I call the DoDragDrop method? And if so, what's the difference?

Answer 1

, , , QueryContinueDrag.

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