How to add the close icon or close button on asp.net crystal report popup window

Hi,

  There is a crystal report on my asp.net application, Normally, when we open crystal report and open popup window, there is a close icon at the right handside corner, however, when I open the the crystal report and open popup window on asp.net page, there is missing the close icon at the right handside corner.  How can I add this close icon or any close button on this popup window? (so user can close it if they don't want to run the report anytime..)

thanks

Kelvin