Want to record the amount of time I actually spend at my desk

[AB1984]

As I spend some of day away from my desk I'm trying to create a spreadsheet that I'm going to put in my startup folder that should record:
1. Time when I login to the computer
2. The times I lock and unlock my screen
3. the time I shutdown the computer

I have point 1 covered, but don't know how to have now() dropped into the cells on the above events, or even if this is possible.
Any ideas?
Cheers

 

[ashokpai]

Hi,

The easiest way to record time is to press the key Ctrl+Shift+; this puts the current time in the cell.

Regards,

Ashok Pai

 

[AB1984]

I appreciate the response, however I was looking for an automated process so, in pseudocode:
On_open
Find first empty cell in column A
enter now() 'I've got this far

If event = screen lock (ctrl+alt+del, or Win+l) then
cell b in current (today's) row = Now()

If event = screen unlock
cell c in current(today's) row = Now()

These two would continue throughout the day logging each time I lock and unlock my computer.
If event = computershutdown
final empty cell in today's column = Now()
Workbook save and exit

Is this possible?