Button command syntax

Hi, with the commands that can be run with buttons, is it possible to have them run / commands in game? For example, I've set up a Skinbox page, and it'd be cool to have the button open skinbox when pressed. I've tried the following but it doesn't seem to like it, not sure if there's a specific syntax required:

        "Setting buttons": [
          {
            "Button unique name - [ Setting text in lang ]": "SBOpen",
            "OffsetMin": "-180 168.75",
            "OffsetMax": "-100 198.75",
            "TextAnchor [ Text alignment ] | 0 - 8": 4,
            "Command": "/skinbox",
            "Button color": "0.517 0.521 0.509 0.5",
            "Text color": "0.75 0.75 0.75 0.75",
            "Close menu after clicking": true
          }

EDIT:

Never mind, worked it out.  For everyone else it's:
 

"Command": "chat.say /skinbox"; 

For example.

Changed Status from Pending to Closed