关tabcontrol Alignment 属性 为 left时文字竖向显示  

private Rectangle tabArea;

private RectangleF tabTextArea ;

private void frmopen_Load(object sender, System.EventArgs e)

{

this.tabControl1.DrawMode = TabDrawMode.OwnerDrawFixed;

}

private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)

{

tabArea = tabControl1.GetTabRect(e.Index);

tabTextArea = RectangleF.op_Implicit(tabControl1.GetTabRect(e.Index));
//tabTextArea = tabControl1.GetTabRect(e.Index);
Graphics g = e.Graphics;

StringFormat sf = new StringFormat();

sf.LineAlignment = StringAlignment.Center;

sf.Alignment = StringAlignment.Center;

Font font = this.tabControl1.Font ;

SolidBrush brush = new SolidBrush(Color.Black);

g.DrawString(((TabControl)(sender)).TabPages[e.Index].Text, font, brush, tabTextArea, sf);

}

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