I have two forms; one of them is containing listview, and another one is just a form.

I want to make a thing :
If I drag an item in listview to a Form, a messagebox would be pop up.
and the message would be text of the item.

However I don't know why 'SelectedItem' is null. When I trace the SelectedItem, it was null.

I found I have to use MouseDown and DragDrop events, but I have no idea how to use.

First one is the listview's code :

```
rListCtrl.MouseDown += rListCtrl_MouseDown;
rListCtrl.DragDrop += rListCtrl_DragDrop;

private void rListCtrl_MouseDown(object sender, MouseEventArgs e)
{
    StringBuilder sb = new STringBuilder();
    sb.Append(radListView1.SelectedItem.ToString());
    testName = sb.ToString();
}

private void rListCtrl_DragDrop(object sender, DragEventArgs e){
{
    MessageBox.Show(testName);
}

```

radListView1 is the name of listview.