Thanks for your support to Sothink software. We are sorry for the inconvenience and unhappiness has been caused by the restriction of our product and my support.
Current version of Sothink FlashVideo Encoder 1.1 (Build: 50913) does not support including button/or slider to an SWF movie. Hope you can understand.
We will take your requirement into consideration in future release of Sothink FlashVideo Encoder program. If we have any news on this issue, we will contact you at soon.
If you need any other help, please feel free to contact us at firstname.lastname@example.org
Thanks for your understanding.