Tradeskill Macro

[wereHamster]

I'm using the following code:

/script
  for i=0,GetNumTradeSkills() do
    local n=GetTradeSkillInfo(i);
    if (n=="Heavy Runecloth Bandage") then
      DoTradeSkill(i,1)
    end
  end

but that works only as long as the tradeskill window is open, is there a way to do a tradeskill in a macro without having to open the tradeskill window? or maybe open the tradeskill window in a macro (/cast Blacksmithing doesn't work)?