Disabling the monitor by timer program on c#

Implement the function of Windows 7 32bit-64bit (also there should be compatibility of the program in vista, xp, 8 ke, ) - Disable the display on a user-configurable timer that starts and starts counting down from the moment of the program launch and does not allow you to turn on the display at specified time intervals.
It is necessary that during the work at the computer in the program it was possible to configure the next timer, for example, every 10 minutes from the start of the display was turned off by the Windows function for 1 minute forcibly, also every 30 minutes from the start for 5 minutes and that they work simultaneously.
I mean. With this setting of timers should turn out about this way for 2 hours of screen operation, it turns off for 20 minutes on half-hours and for 12 minutes on ten-minute timers.
Forced means that it is necessary that it is impossible to return to work with the computer, during the time intervals specified by the timer (i.e., the computer is not used). When the screen is turned off, lock keyboard input and mouse activity at this time
Prescribe for the program autoboot in a tray folded., with the opening of the right mouse button menu items-
Open the settings.
Stop the timer
In the program window itself, implement setting and saving timers for the duration of the program at intervals set by the user, so that when you restart the computer, the timer schedule settings are saved., the stop timer button with the choice of the number of hours for which it stops.
Please inform us about the time and cost of development.
Together and separately, 32 bit versions of 64 bit versions
If it is not possible to make a universal
Costs for individual operating systems