Get coordinates points between x and y - c# winforms

 I have completed my functionality

// page level declaration

 private Rectangle SelectedRect; public List<Rectangle> listRec = new List<Rectangle>();

// on page load add all the rectangle in the rectanglelist.

 private void Highlightimage_Load(object sender, EventArgs e) { for (int i = 0; i < table.Rows.Count; i++) { int x = Convert.ToInt32(table.Rows[i][0]); int y = Convert.ToInt32(table.Rows[i][1]); int width = Convert.ToInt32(table.Rows[i][2]); int height = Convert.ToInt32(table.Rows[i][3]); SelectedRect.Size = new Size(width, height); SelectedRect.X = x; SelectedRect.Y = y;                             listRec.Add(SelectedRect); } }

// draw the rectangle

private void pictureBox1_Paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; foreach (Rectangle rec in listRec) { Pen p = new Pen(Color.Red);                                 g.DrawRectangle(p, rec); } } private Rectangle MakeRectangle(int x0, int y0, int x1, int y1) { return new Rectangle( Math.Min(x0, x1), Math.Min(y0, y1), Math.Abs(x0 - x1), Math.Abs(y0 - y1)); }

//finally on mouse move checking the condition

private void pictureBox1_MouseMove(object sender, MouseEventArgs e) { foreach (Rectangle rec in listRec) { SelectedRect = MakeRectangle(rec.Left, rec.Top, rec.Right, rec.Bottom); if ( (e.X >= SelectedRect.Left) && (e.X <= SelectedRect.Right) && (e.Y >= SelectedRect.Top) && (e.Y <= SelectedRect.Bottom)) { MessageBox.Show("test"); } } }