How can you prevent a window being captured by Print-Screen?

Posted by John on Stack Overflow See other posts from Stack Overflow or by John
Published on 2010-06-11T12:21:21Z Indexed on 2010/06/11 12:22 UTC
Read the original article Hit count: 174

Filed under:

Windows

|

win32

I noticed a few times than when I print-screen while Media Player is running, the content is replaced with a grey rectangle. I've no idea if it's deliberate due to DRM, or some technical issue, but it struck me that being able to deliberately block screen-capture might be a useful feature in some scenarios.

Is there some specific message each HWND gets for print-screen - does Windows do a special repaint or simply dump buffers to the clipboard?

I guess I'd prefer to focus this on Win32 specifically, but as long as it's Windows-related then fine.

© Stack Overflow or respective owner

Related posts about Windows

Server 2012 DFS New Member Issue

as seen on Server Fault - Search for 'Server Fault'
I am trying to add a new member to our DFS topology. We have 3 DCs (VMs - VMware) running Windows server 2012, two servers are located in or Primary site and the third at our DR site. Currently the two servers at our primary site are currently replicating DFS (full mesh) and are working fine. I have… >>> More
error in IIS7 but not on IIS6

as seen on Server Fault - Search for 'Server Fault'
I have a website that is we are now deploying to windows 2008 servers that has worked in the past on IIS6 without a problem. It is using .net 2 framework. Most of the website works. Just when we create a screen report over a certain size on the server we get this error. Event code: 3005 Event… >>> More
error in IIS7 but not on IIS6

as seen on Server Fault - Search for 'Server Fault'
I have a website that is we are now deploying to windows 2008 servers that has worked in the past on IIS6 without a problem. It is using .net 2 framework. Most of the website works. Just when we create a screen report over a certain size on the server we get this error. Event code: 3005 Event… >>> More
Microsoft Management Console stops working when I add snap-in to it

as seen on Super User - Search for 'Super User'
I have Windows 7 Ultimate OS. I'm opening mmc.exe as administrator and trying add Certificates or any other snap-in, then while loading that snap-in MMC breaks and displays following message and after that it closes automatically once I click on close button on that message. What could be the problem… >>> More
Handling keyboard and mouse input (Win API)

as seen on Game Development - Search for 'Game Development'
There is a number of ways to catch mouse or keyboard under Windows. So I tried some of them, but every of them has some advantages and drawbacks. I want to ask you: Which method do use? I've tried these: WM_KEYDOWN/WM_KEYUP - Main disadvantage is that, I can't distinguish between left and right-handed… >>> More

Related posts about win32

RuntimeError: maximum recursion depth exceeded while calling a Python object

as seen on Stack Overflow - Search for 'Stack Overflow'
this error arises when i try to run the following test case which is written in models.py of my django app named 'administration' : from django.test import Client, TestCase from django.core import mail class ClientTest( TestCase ): fixtures = [ 'testdata.json' ] def test_get_register(… >>> More
How do I poke the flag in a win32 PE that controls console window display

as seen on Stack Overflow - Search for 'Stack Overflow'
I have an executable which is part of a batch process. This one executable opens a console window, which is annoying since it's useless to the end user and steals focus away from their active task. We can't compile a new version from of this EXE from source (easily). Is there an easy way to twiddle… >>> More
Keyboard Input & the Win32 message loop

as seen on Stack Overflow - Search for 'Stack Overflow'
How do I handle key presses and key up events in the windows message loop? I need to be able to call two functions OnKeyUp(char c); and OnKeyDown(char c);. Current literature I've found from googling has lead me to confusion over WM_CHAR or WM_KEYUP and WM_KEYDOWN, and is normally targeted at PDA… >>> More
Invalid algorithm specified on Windows 2003 Server only

as seen on Stack Overflow - Search for 'Stack Overflow'
I am decoding a file using the following method: string outFileName = zfoFileName.Replace(".zfo", "_tmp.zfo"); FileStream inFile = null; FileStream outFile = null; inFile = File.Open(zfoFileName, FileMode.Open); outFile = File.Create(outFileName); LargeCMS.CMS cms = new LargeCMS.CMS(); cms.Decode(inFile… >>> More
How to Compile Mod_Python 3.3.1 for Python 2.6 and Apache 2.2 on Windows?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have no experience compiling code other than using Visual Studio's Build command. I am hoping we can create a step by step guide for compiling mod_python on windows. Please be as descriptive as possible. This is what I've done so far: Download and install python 2.6.2 Download and install apache… >>> More