local major, minor = wx.wxGetOsVersion()
local dir = mc.mcCntlGetMachDir(inst);
local cmd = "explorer.exe /open," .. dir .. "\\Docs\\MyDoc.pdf"
if(minor <= 5) then -- Xp we don't need the /open
cmd = "explorer.exe ," .. dir .. "\\Docs\\MyDoc.pdf"
end
wx.wxExecute(cmd)