C# 自定义绘制（多层）嵌入式TabControls错误

我有一个winform应用程序，它有3层深的tabcontrols。我正在使用下面的类动态地为选项卡着色。当它为嵌入的tabcontrol设置颜色时，它会调整大小

A first chance exception of type 'System.ComponentModel.Win32Exception' occurred in System.Windows.Forms.dll

我需要为这些做些不同的事情吗？如果我注释掉对tabRenderer的嵌入表单调用，那么我不会得到这些错误。我没有正确地处理我的对象吗

这完全是另外一回事吗？我嵌入选项卡控件的方式

我的程序当前外观的示例如下-->

（来源：）
自 如您所见，有3层选项卡控件。这在程序中发生两次，都会导致上述错误。总共有6个对tabRenderer的调用，因为有5个选项卡控件。1个顶级、3个二级和2个三级

用于为选项卡控件着色的代码：

public class psTabRenderer
{
    private TabControl _tabControl;
    private Color _fillColor;
    private Color _selectedFillColor;
    private Color _textColor;
    private Color _selectedTextColor;

    public psTabRenderer(TabControl tabControl, Color fillColor, Color selectedFillColor, Color textColor, Color selectedTextColor)
    {
        _tabControl = tabControl;
        _fillColor = fillColor;
        _selectedFillColor = selectedFillColor;
        _textColor = textColor;
        _selectedTextColor = selectedTextColor;

        _tabControl.DrawMode = TabDrawMode.OwnerDrawFixed;
        _tabControl.DrawItem += TabControlDrawItem;
    }

    private void TabControlDrawItem(object sender, DrawItemEventArgs e)
    {
        TabPage currentTab = _tabControl.TabPages[e.Index];
        Rectangle itemRect = _tabControl.GetTabRect(e.Index);
        var fillBrush = new SolidBrush(_fillColor);
        var textBrush = new SolidBrush(_textColor);
        var sf = new StringFormat
        {
            Alignment = StringAlignment.Center,
            LineAlignment = StringAlignment.Center
        };

        //If we are currently painting the Selected TabItem we'll
        //change the brush colors and inflate the rectangle.
        if (Convert.ToBoolean(e.State & DrawItemState.Selected))
        {
            fillBrush.Color = _selectedFillColor;
            textBrush.Color = _selectedTextColor;
            itemRect.Inflate(2, 2);
        }

        //Set up rotation for left and right aligned tabs
        if (_tabControl.Alignment == TabAlignment.Left || _tabControl.Alignment == TabAlignment.Right)
        {
            float rotateAngle = 90;
            if (_tabControl.Alignment == TabAlignment.Left)
                rotateAngle = 270;
            var cp = new PointF(itemRect.Left + (itemRect.Width / 2), itemRect.Top + (itemRect.Height / 2));
            e.Graphics.TranslateTransform(cp.X, cp.Y);
            e.Graphics.RotateTransform(rotateAngle);
            itemRect = new Rectangle(-(itemRect.Height / 2), -(itemRect.Width / 2), itemRect.Height, itemRect.Width);
        }

        //Next we'll paint the TabItem with our Fill Brush
        e.Graphics.FillRectangle(fillBrush, itemRect);

        //Now draw the text.
        e.Graphics.DrawString(currentTab.Text, e.Font, textBrush, (RectangleF)itemRect, sf);

        //Reset any Graphics rotation
        e.Graphics.ResetTransform();

        //Finally, we should Dispose of our brushes.
        fillBrush.Dispose();
        textBrush.Dispose();
    }
}

我这样称呼它：

        private void frmMCPEmployment_Load(object sender, EventArgs e)
    {
        FormPaint();
    }

    public void FormPaint()
    {
        // ToDo: This call to the Tab Renderer is throwing a Win32 "Error Creating Window Handle" 
        new psTabRenderer(tclEmployment, Color.LightSteelBlue, Color.Khaki, Color.Black, Color.Black);
    }

---

好的，我回答了我自己的问题

我相信，当我的应用程序加载时，它开始触发每个Forms Load（）事件，然后触发它的嵌入式Forms Load（）事件，以此类推。我在load事件中抛出了对TabRenderer的调用，发生了一些我不理解的事情。我将调用调出一个PaintTabs（）函数，然后等待第一个函数完成，然后再调用下一个函数（我想是吧？）

无论哪种方式，它都不再产生任何错误。我现在从顶级TabControl中这样称呼它：

        public void PaintTabs()
    {
        new psTabRenderer(tclWWCModuleHost, Color.LightSteelBlue, Color.Khaki, Color.Black, Color.Black);
        FrmWwcMemberHost.PaintTabs();
        FrmWwcMcpHost.PaintTabs();
        FrmCaseNotes.PaintTabs();
    }