[2.0] Updating a specific part of my window (in the paint event)

Code:

---

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
                        for (int i = 0; i < currentGrid.GetUpperBound(0); i++)
                        {
                                for (int k = 0; k < currentGrid.GetUpperBound(1); k++)
                                {
                                        Bitmap bmp = new Bitmap(images[currentGrid[i, k]]);
                                        e.Graphics.DrawImage(bmp, new Point(k * gridWidth, i * gridHeight));
                                        bmp.Dispose();
                                        bmp = null;
                                }
                        }       
                        HighlightTile(e);
                }

---

when I click, it updates the position that my highlighted tile is at, however I have to call this.Refresh();, and it lags because I am drawing the whole thing again, any way I can refresh 'only' a part of it?

tried something like this?

C# Code:

Me.Invalidate (New Rectangle(0,0,100,100));

Just specify a region to be repainted using either a Rectangle or a Region.
http://msdn2.microsoft.com/en-us/lib...te(VS.80).aspx

Thanks vm