OMG, yes it's "Message" not "massage",
Pardon me guys,
btw in HTC mEssaging 1.8, I can't do like what U said tjelite , we can't select one of the conversation and copy some text from it, it's so sad. But I figured out, I just use "forward" menu, and when the dialog came up, I can selected text from it, and yipeeeeeee, I can copy it.