在DFL中如何做一个对话框呢？

原本以为做个对话框应该很简单，但是好像并不简单，以下是代码，编译没有问题，就是不能弹出对话框，看来java程序在我的脑子中根深蒂固了，在DFL上这样的模式估计不行。

需求很简单，就是一个弹出对话框，上面有几个文本框，可以输入一些数据。

module dfl.AgendaDialog;

import dfl.all;

class AgendaDialog: CommonDialog
{
    Panel panelAgenda;
    Label labelAgenda;
    Label labelDate;
    Label labelTimeFrom;

    TextBox textBoxDate;
    TextBox textBoxTimeFrom;
    TextBox textBoxTimeTo;

    RichTextBox richTextBoxAgenda;

    this()
    {
        //Application.ppin(cast(void*)this);//有这句话编译都过不去
        initializeMyPanel();
    }

    public override void reset()
    {
    }

    public override DialogResult showDialog()
    {
        msgBox("befor show dialog, no para! ", "Info", MsgBoxButtons.OK, MsgBoxIcon.INFORMATION);

        return runDialog(GetActiveWindow()) ? DialogResult.OK : DialogResult.CANCEL;
    }

    public override DialogResult showDialog(IWindow owner)
    {
        msgBox("befor show dialog, has para IWindow!", "Info", MsgBoxButtons.OK, MsgBoxIcon.INFORMATION);

        return runDialog(owner ? owner.handle : GetActiveWindow()) ? DialogResult.OK : DialogResult.CANCEL;
    }

    public override bool runDialog(HWND owner)
    {
        return true;
    }

    private void initializeMyPanel()
    {
        panelAgenda = new Panel();
        panelAgenda.name = "MyPanel";
        panelAgenda.bounds = dfl.all.Rect(0, 0, 376, 248);

        labelDate = new Label();
        labelDate.name = "labelDate";
        labelDate.text = "日期";
        labelDate.textAlign = dfl.all.ContentAlignment.MIDDLE_RIGHT;
        labelDate.bounds = dfl.all.Rect(8, 16, 44, 23);
        labelDate.parent = panelAgenda;

        textBoxDate = new TextBox();
        textBoxDate.name = "textBoxDate";
        textBoxDate.text = "textBoxDate";
        textBoxDate.bounds = dfl.all.Rect(64, 16, 296, 23);
        textBoxDate.parent = panelAgenda;

        textBoxTimeFrom = new TextBox();
        textBoxTimeFrom.name = "textBoxTimeFrom";
        textBoxTimeFrom.text = "textBoxTimeFrom";
        textBoxTimeFrom.bounds = dfl.all.Rect(64, 56, 120, 23);
        textBoxTimeFrom.parent = panelAgenda;

        labelTimeFrom = new Label();
        labelTimeFrom.name = "labelTimeFrom";
        labelTimeFrom.text = "时间";
        labelTimeFrom.textAlign = dfl.all.ContentAlignment.MIDDLE_RIGHT;
        labelTimeFrom.bounds = dfl.all.Rect(8, 56, 44, 23);
        labelTimeFrom.parent = panelAgenda;

        textBoxTimeTo = new TextBox();
        textBoxTimeTo.name = "textBoxTimeTo";
        textBoxTimeTo.text = "textBoxTimeTo";
        textBoxTimeTo.bounds = dfl.all.Rect(240, 56, 120, 23);
        textBoxTimeTo.parent = panelAgenda;

        labelAgenda = new Label();
        labelAgenda.name = "labelAgenda";
        labelAgenda.text = "事件";
        labelAgenda.textAlign = dfl.all.ContentAlignment.MIDDLE_RIGHT;
        labelAgenda.bounds = dfl.all.Rect(8, 96, 44, 23);
        labelAgenda.parent = panelAgenda;

        richTextBoxAgenda = new RichTextBox();
        richTextBoxAgenda.name = "richTextBoxAgenda";
        richTextBoxAgenda.scrollBars = dfl.all.RichTextBoxScrollBars.VERTICAL;
        richTextBoxAgenda.bounds = dfl.all.Rect(64, 96, 296, 144);
        richTextBoxAgenda.parent = panelAgenda;
    }
}