Screen shot is "blank" in some case

[Juvigy]

It may be connected to VGA drivers and settings. Try to dig and test in that direction.

[gillesg]

Hmmm Minecraft is able to make its own screenshots. You press F2. Does this not work?

http://www.minecraftwiki.net/wiki/Screenshots

Excellent news, I was not aware of that.

The thing is that it does work ! ! !

The manual windows 'PrintScreen' does not work, but the F2 function in Minecraft does. Do you have any clue of why it should be like this ?

Is that why you are trying a custom method?

I am usisng a tool that makes regular screenshot as a parental control tool. It is mainly to track computer usage. Every thing was fine with XP, but with Seven, some blank (black) screen appeared.

This is why I am trying to fix that.

Edited June 27, 2012 by gillesg

[gillesg]

It may be connected to VGA drivers and settings. Try to dig and test in that direction.

I would be surprised. The test I am doing is on the same computer with 2 different OS (XP 32 bits ou Seven 64 bits). both are using nvida drivers 301.42.

But i will look in that direction too.

[zarknoid]

If possible set the compatability mode of the program properties and see if it works

[Kidney]

This is a problem with the win7 and the way it let's games control your computer. Most modern games re-bind some keys to do other functions. I know that for SWTOR, if you press the screenshot key, it takes a screenshot of the game only and places it in your documents folder. It is game specific. I would try and find a program that can do screen captures like fraps and just have that take screenshots in intervals.