How to drag and drop a file from the file explorer into a datagridview cell in VB.NET

Private Sub DataGridView1_DragDrop(sender As Object, e As DragEventArgs) Handles DataGridView1.DragDrop
Dim C, R as integer
...
Dim myDGV As DataGridView = sender
        Dim HtInfo As DataGridView.HitTestInfo = myDGV.HitTest(e.X, e.Y)
        If HtInfo.Type = DataGridViewHitTestType.Cell Then
            C = HtInfo.ColumnIndex
            R = HtInfo.RowIndex
            DropColNo = C : DropRowNo = R
            lblDebug.Text &= " Hit=" & C & "," & R & " "
            myUseCol = C : myUseRow = R
            'DataGridView1.CurrentCell = DataGridView1(C, R)
            Debug.WriteLine("Drag Drop Current HIT Cell " & C & "," & R)
            GoTo DoPic
        Else
            C = HtInfo.ColumnIndex : R = HtInfo.RowIndex
            Debug.WriteLine("Drag Drop Current Bad HT=" & C & "," & R)
            lblDebug.Text &= " Invalid type " & HtInfo.Type.ToString()
            If DropColNo > -1 AndAlso DropRowNo > -1 Then
                myUseCol = DropColNo : myUseRow = DropRowNo
                'DataGridView1.CurrentCell = DataGridView1(DropColNo, DropRowNo)
                Debug.WriteLine("Drag Drop bad Hit Cell " & DropColNo & "," & DropRowNo & " " & HtInfo.Type.ToString())
            Else
                lblDebug.Text &= " invalid drop=" & DropColNo & "," & DropRowNo & " "
                Debug.WriteLine("Drag Drop bad dropCol/Row invalid drop=" & DropColNo & "," & DropRowNo & " ")
            End If
        End If
...
End Sub