Is it possible to switch the monitor input (analog/digital) programmatically?

I found a solution.

Ugly but working:
I found the tool http://www.skynergy.com/hotkeyz.html .
And i am using http://synergy2.sourceforge.net .

I installed Synergy-Server on prometheus and Synergy-Client on andromeda and configured it like this:
Then i installed HotKeyz on both PCs and configured it like this:
PC: prometheus
name: Switch to Andromeda
hotkey: Control + Alt + 1
command: Multiple Commands
command 1: Remap
params 1: [ControlD][AltD][3][AltU][ControlU]
command 2: Monitor Off

PC: andromeda
name: Switch to Prometheus
hotkey: Control + Alt + 2
command: Monitor Off

How it works ...
When i hit Control+Alt+1 on prometheus
1.) HotKeyz executes Control+Alt+3
2.) [1.] triggers Synergy to send a keystroke to andromeda to wake it up
3.) [1.] triggers Synergy to switchToScreen(andromeda), which sends all following keyboard an mouse activity to andromeda
4.) HotKeyz turns the monitor off
5.) Now the monitor notices, that there is no signal from prometheus anymore and switches to andromeda

When i hit Control+Alt+2 on andromeda
1.) Synergy calls switchToScreen(prometheus)
2.) Synergy sends a keystroke to prometheus to wake it up
3.) Synergy sends Control+Alt+2 to andromeda
4.) [3.] triggers HotKeyz on andromeda which turns of the monitor
5.) Now the monitor notices, that there is no signal from andromeda anymore and switches to prometheus

voilà ...

Tipp:
Hold the mouse still while switching. Otherwise it may happen, that the switch doesn't work as expected. (Instead the focus switches, but the monitor does not.)

Greetings Finomosec;