Get The Dragged Data From A Variable?

i am creating a text editor, I have a drag and drop feature. the dragged data come from the labels text. I want to get the dat from other source , in a variable. Because the content of my labels text are sentences, I want to show that in only one word.

Here is the code for my drag and drop

Dim rtb As RichTextBox
Private Sub Form6_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Label1.Text = "hello"
rtb = New RichTextBox With {.AllowDrop = True}

[code]....