The guide can take you to any channel by tapping the left side on the channel you want to tune.
If you want to duplicate such a button on a Virtual Remote, you can create a button wherever you would like on the Virtual Remote and add the appropriate commands to it. For most infrared devices, that would be the DIGIT XX commands and then ENTER. For various IP control devices such as DirecTV and TiVo, a special .CHANNEL SET command exists that takes a parameter of the complete channel number.