Macro language

[Amaroq]

Ive been learning how to set up macros in the last few days and theres one i just cant seem to figure...any of the chat modes. I want a macro that opens up the chat channel/mode for a particular player...a friend i might talk too alot. The last ones i tried but failed were

/cm t [playersName]

/cm t playersName

/cm <t> [playersName]

/cm <t> playersName

Italic just meaning id use the players full name here. This is for a marco button, not directly entering in command line every time. Any help would be appreciated ^_^