ToolbarPane is the Toolbar number - starts from 00
Put your armour in the slots on the toolbar.
U can then put the macro anywhere on any toolbar pane and select.

My composite Armour Macro button is in ToolbarPane 02 (i.e. 3rd Toolbar).
My Composite Armour is set up in ToolbarPane 01 and selected when i press the macro button as below:


/ui action toolbarPane01;
;
/ui action toolbarSlot00;
;
/ui action toolbarSlot01;
/ui action toolbarSlot02;
/ui action toolbarSlot03;
;
/ui action toolbarSlot04;
;
/ui action toolbarSlot05;
;
/ui action toolbarSlot06;
;
/ui action toolbarPane02;
;