Private Sub cmdOK_Click()
Dim rngSource As Range, rngTarget As Range, rngStart As Range
Set rngStart = Range(txtStart.Text)
Set rngSource = Range _
(Cells(rngStart.Row, rngStart.Column), _
Cells(rngStart.Row + txtRows.Text - 1, _
rngStart.Column + txtColumns.Text - 1))
rngSource.Copy Range("A16")
Unload Me
End Sub