query about datetime struct

Question

hi.. while i'm using datetime struct in a c# forms application for pocket pc i'm not able to read the number of milliseconds..it is showing the resolution of one tenth of a second...that is it is showing the seconds as 2.3 s or 2.4 s but not as 2.345 s...but when used in desktop computer it is showing the resolution of 1 millisecond...is it because i made it compatible to pocket pc...if so..is there any way to use a timer with one millisecond resolution...i tried the timer class too but it is not being recognised(ambiguous class) in pocket pc compatible program...can somebody help with this out... thank u...