How to personate popup windows

How I can personate apperance of pop-up windows? I would like to
build my own windows for sticky note when I'm in edition mode.


To implement your own version of sticky notes you can derive a class
from PDFViewCtrl and override a few event handlers. For example, the
following code overrides mouse double-click event which PDFViewCtrl
uses to open popup windows on sticky note annotations. You can handle
these events in a similar fashion to open your own popup window or to
implement any other type of action.

public class MyPDFView : PDFViewCtrl
  protected override void OnMouseDoubleClick(MouseEventArgs e) {
    int page_num = GetPageNumberFromScreenPt(e.X, e.Y);
    bool processed = false;
    if( page_num < 1 ) return;

    // Find the click point in page coordinate system...
    double x = e.X;
    double y = e.Y;
    ConvScreenPtToPagePt(ref x, ref y, page_num);

    // Loop over annotations on page and check if the click
    // landed inside one of the sticky note annotations.
    // In that case, we pop up a custom message box.
    Page page = GetDoc().GetPage(page_num);
    int annot_num = page.GetNumAnnots();
    for (int i = 0; i < annot_num; ++i) {
      Annot annot = page.GetAnnot(i);
      if (annot.IsValid() == false || annot.GetType() !=
Annot.Type.e_Text) continue;
      Rect box = annot.GetRect();
      if (box.Contains(x, y)) {
        processed = true;
        MessageBox.Show("Sticky Note Popup", "Open your own sticky
note popup here");

    // If we had not done anything, allow processing of the event in
the base class.
    if (!processed) base.OnMouseDoubleClick(e);

As a starting point for you may want to go over PDFView sample project
( which
implements a number of custom tools (e.g. markup, link creation, etc -
in MyPDFView.cp) and various customizations to the base PDFViewCtrl.

Thanks for your response.

And how can I move my own popup when the page scroling?