แสดง Label แนวตั้ง set properties -> Paint
private void labelIndicator_Paint(object sender, PaintEventArgs e) { Font myfont = new System.Drawing.Font("Microsoft Sans Serif",7); Brush mybrush = new System.Drawing.SolidBrush(System.Drawing.Color.Black); e.Graphics.TranslateTransform(6,50); e.Graphics.RotateTransform(-90); e.Graphics.DrawString("Compensate", myfont, mybrush, 0, 0); }