Lee Ann, 

Thanks for the reply. I took a look at the "Son of Grab" app -- if I've 
understood it correctly, it appears to be related to the setSharingType 
property of the window in question, which I already have set to none -- which 
means no other process should be able to capture it. It appears that isn't the 
case with Command-Shift-3 however, which seems to still create screen shots 
unimpeded. 

Brad

On Mar 6, 2013, at 2:14 PM, Lee Ann Rucker <lruc...@vmware.com> wrote:

> 
> On Mar 6, 2013, at 9:02 AM, Jens Alfke wrote:
> 
>> 
>> On Mar 6, 2013, at 8:37 AM, Brad O'Hearne <br...@bighillsoftware.com> wrote:
>> 
>>> I am interested in the capabilities of the machine (OS X) and if so, how. I 
>>> need to programmatically within an app (not by external system 
>>> administration) turn off all screen capture capability, by hotkeys, or by 
>>> grabbing the contents of the window.
>> 
>> Apple’s DVD player app does this, for DRM purposes*. I don’t know how it 
>> manages it, whether it’s some public system API or an internal-only thing … 
>> but it might be a useful clue to track down.
> 
> I'd start with the "Son Of Grab" sample app; it shows how to get the contents 
> of other app's windows, so that's where I'd look to figure out how to prevent 
> that.


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