Detect ScreenShot

[Kwai chang caine]

Hello at all

I'm ask a question to me..in my head.
But the problem, it's that when i ask the question myself...i have never answer
It's the reason why, i ask the same question at you all, who have always the answers

Believe you, that it's possible, to detect a screenshot make by another application ????

Good day

[Josh]

- register your program in the chain of clipboardviewers
- scan the windows callback to the message #WM_DRAWCLIPBOARD
- look what is in the clipboard

details are your problem

[Kwai chang caine]

Hello JOSH

You mean that all the ScreenShot program use always ClipBoard ??? :roll:
Are you sure ????
Because i have a program freeware "SnapShot" who make ScreenShot and ask if i want save it on the drive ....

[Josh]

you are right. i didn't read your question exactly enough and didn't check, you are speaking from other applications.

[codewalker]

anti keyloggers do it all the time . . . .

[netmaestro]

I would say not, mainly because there are so many ways to go about it.

[Mr Coder]

detect a screenshot make by another application ????

No way. Any app can examine the screen at any time and record the pixels, without using the clipboard.

[SFSxOI]

Good question Kwai, i'd like to know this too.

[ar-s]

Don't you just have to clean the clipboard each xx ms ?

[Mr Coder]

How is cleaning the clipboard going to help?

[DarkDragon]

Sure, detecting a screenshot could be possible if you are rendering the desktop through your own codec. Haven't you ever wanted to take a screenshot from a movie and after inserting it in paint or such the screenshot still changes to the movie?

[ar-s]

How is cleaning the clipboard going to help?

Maybe the screenshot's software use clipboard to take the shot and save picture after that ?

[SFSxOI]

I think it would be more a matter of detecting when that other application was doing a screen shot rather then detecting the method used to facilitate the screen shot. In other words, is there some sort of message to be intercepted from the application to the system that says its taking a screen shot.

[Mr Coder]

There's plenty of code samples in these forums that show how to take a screenshot without using the clipboard and without system messages.

[SFSxOI]

There's plenty of code samples in these forums that show how to take a screenshot without using the clipboard and without system messages.

Perhaps I missed something, but he doesn't want to take a screen shot, he wants to detect when another appliction takes a screen shot.

Like where he said in his original post > "Believe you, that it's possible, to detect a screenshot make by another application ????" (ya kinda need to understand "Kwai-wan-neese" )