I tried all the lowercase letters and I only found one, besides -w that does anything.
-p causes my cursor to display the "working" animation for 20 seconds, then nothing happens at all. When I go to task manager I see that there's a deathlock.exe running and getting cpu, but I have no idea what it's doing (at this step I discovered that on Windows8, there's no longer an option to switch to an application selected in task manager - I'd have tried it, otherwise). Also <alt><tab> doesn't show a deathlock application to switch to.
Strange. Does anybody remember what -p does for other applications? It may be that it's setting some value of something as in -p100 but I'm setting the value to null by not including a number... nope: when I try -p100 it says it is an "unknown parameter".
I'm not going to try digits or uppercase letters, so I guess I'm done with this line of reasoning.
Any more ideas?