Screen Capture on non-rooted phone

Note these buttons arent on your touchscreen they are your softkeys directly below the touchscreen...

First off make sure the cappy is running 2.2 froyo then hold the back button(backwards arrow) which is in between the search button(magnifying glass) and Home button(looks like house)..

While you are holding the back button(backwards arrow) softkey down. press the home button(house). You should hear a click.. if not try again.. if you dont hear it at all just check your gallery to see if it captured it should be under Screen captures or something like that in your gallery if you did it right..

Note: I am about 90% correct on this but i cant test it as my phone is nowhere near stock anymore and this is all I remember doing... But let me know if it works because i found that trick by accident pretty much the same way i learned how to capture the screen on my iphone about 5 years ago... I found this when i was playing with the leaked 2.2 firmware a little after 2.2 roms started coming out.  but its been a while since ive been on 2.2 and ive been rooted so long i havent worried about things like this in a while. Best of luck!

I don't understand this.  This doesn't work, yet I every so often, do it on accident. #notafan obviously it's possible, but nobody can seem to get it to work on command without being rooted or having a seperate app, right?

I did it on accident, too, awhile  back. I have no clue how I did it and I can't seem to take another screen capture. I know it's possible. But the method is a pain.

So is this only going to work on a stock OS maybe? I've never managed a screen capture, accidentially or other wise. I tried the back + home trick but it doesn't work. However it might make a difference that I have Go Launcher and not the stock OS...