printing time stamps

I am writing streams of information to a text file and on each line i need a time stamp that is very very very accurate, stupidly accurate infact so it will say something like:

13:30:336252458559655


I need this to time keystrokes and how quickly in succession they are typed!:confused:

Any ideas would be greatfully recieved


Cheers
Andy:p

If your program controls the timing of events (start-stop like a stopwatch) then the best precision you can get would involve using the performance counter. This does not give you the current system time, but can be used to get starting and stoppoing counts which can be resolved into times down to a fraction of a second. You need to use QuerryPerformaceFrequency and QueryPerformanceCounter.

If your program is meant to take times at which events occur on a machine (database updates, user login times, etc) then I think functions such at GetSystemTime would be better.