At creation of the button a user specifies the URL-address to which he/she will be taken having pressed the button. The additional data can be included in the formed address from Plesk system: the name and the id of the domain, the id and the registration data of the client. These data can be used for organizing the interaction between third-party applications and Plesk system. During creation of the button the mode of the URL display is specified - inside of the control panel, or in a new window, and also its location and accessibility (to whom of system users it is going to be accessible).