如何自定义提示窗口(Hint Window)

　　// 自定义 THintWindow 类
class TCcrunHintWindow : public THintWindow
{
    bool FActivating;
    __fastcall TCcrunHintWindow(TComponent* Owner)
            : THintWindow(Owner)
    {
        Canvas->Font->Name = "宋体";
        Canvas->Font->Color = clBlack;
        Canvas->Font->Size = 9;
    }
    void __fastcall Paint(void)
    {
        TRect rect = ClientRect;
        // Hint边框颜色
        Canvas->Brush->Color = TColor(0xDBB8BA);
        Canvas->FillRect(rect);
        // 绘制整个Hint的边框
        Canvas->Pen->Color = TColor(0x69230E);
        Canvas->Rectangle(rect);
        // Hint背景的颜色
        Color = clWhite;
        // Hint文字透明
        Canvas->Brush->Style = bsClear;
        // 绘出Hint文字
        Canvas->Font->Color = clBlack;
        Canvas->TextOut(4, int(rect.Bottom / 2)
                - int(Canvas->TextHeight(Caption) / 2), Caption);
    }
    virtual void __fastcall NCPaint(HDC hdc)
    {
        // 63 63 72 75 6E 2E 63 6F 6D
        Invalidate();
    }
    virtual void __fastcall CreateParams(TCreateParams