how to adjust the default width of taglist window in vim

The default widt开发者_运维技巧h of taglist window is too narrow for me and sometimes I can't see the whole function name in the window so I'd like to adujct the width of the window. I know use ctr-w > or ctr-w < I can adjust the window manually , but really want to change the default value of the taglisst window. so how I can actually do it ? thansk in advance.

let Tlist_WinWidth = somenumber