Upgrade TFS diff

I use WinMerge and I like its diff, is better than TFS diff (e.g. does not show characters changed in a line) so I looked for a way to use it instead, below are steps in case you are interested.

In VS goto Tools -> Options -> Source Coltrol -> Visual Studio Team Foundation -> Configure User Tools
There add an entry for winmerge, would like something like below




















You can configure any diff tool here, but WinMerge is good enough for me.