FWIW, you could use a Word document such as the one you've already created for this. For example, if you add the following code to the document and save it in the doc or docm format, you could use the following code with your existing button:
Code:
Private Sub CommandButton1_Click()
Dim Rng As Range
Set Rng = Selection.Cells(1).Range
With Rng
.End = .Paragraphs.Last.Range.Start - 1
While .Characters.Last.Text = vbCr
.End = .End - 1
Wend
ActiveDocument.Tables(2).Cell(2, 2).Range.Text = .Text
End With
End Sub
Simply add the code to the document's 'ThisDocument' VBA code module.
Do note that users will need to enable macros for the button to work.