Winform 解决TabControl 页里面多余边距问题

1.直接新建一个类，继承TabControl，然后 override DisplayRectangle 方法：

 /// <summary>
    /// 解决系统TabControl多余边距问题
    /// </summary>
    public class FullTabControl : TabControl {

        public override Rectangle DisplayRectangle {
            get {
                Rectangle rect = base.DisplayRectangle;
                return new Rectangle(rect.Left - 4, rect.Top - 4, rect.Width + 8, rect.Height + 8);
            }
        }
    }

以后用 FullTabControl 就行。（这种方法简单）

ps：令 Form.Designer.cs中的this.tabControl1 = new FullTabControl();

2.参见以下网址（VB.NET）代

码：http://www.blueshop.com.tw/board/FUM20050124191756KKC/BRD201112281018075B8.html

public class FullTabControl : NativeWindow {
        static int TCM_FIRST = 0x1300;
        static int TCM_ADJUSTRECT = (TCM_FIRST + 40);
        struct RECT{
            public int Left, Top, Right, Bottom;
        }

        protected override void WndProc(ref Message m) {
            if (m.Msg == TCM_ADJUSTRECT) {
                RECT rc = (RECT)m.GetLParam(typeof(RECT));
                rc.Left -= 4;
                rc.Right += 3;
                rc.Top -= 4;
                rc.Bottom += 3;
                Marshal.StructureToPtr(rc, m.LParam, true);
            }

            base.WndProc(ref m);
        }
    }

调用方法：new FullTabControl().AssignHandle(tabControl1.Handle);// tabControl1为窗口上TabControl控件的名称