I fixed the problem of displaing the icon of a file with uppercas exetnsion and store the information about allowed maxmal/total/minimal pixels for images and filesizes for upload in a session now.

I fixed displaing image files that don’t fit the defined pixels in the browse window on the internet server.

I fixed the message when trying to upload a file that already exists.

<asp:textbox id="Image1" runat="server"></asp:textbox>
<ctrl:uploaddialogbutton 
  id="Image1Button" 
  runat="server" 
  allowcreatefolder="True" 
  allowdelete="True" 
  demomode="True" 
  filetypes="gif,jpg"
  uploaddirectory="images/" 
  controltofill="Image1" 
  filenameonly="True">
</ctrl:uploaddialogbutton>