是否可以在visual studio 9中为特定单词设置颜色？

I have to use a lot of specific variables at my work (like T_ULONG or T_SWORD) and I'd like them to be displayed as variables (blue color or whatever). It's quite annoying to have whole pieces of code in black and white ... I saw that there were a lot of themes for VS, but these won't solve my problem...I have to use a lot of specific variables at my