How to get the Interface of a specific application?Help!

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Input the window's handle and print to the device.
PS: I have tried to use PrintWindow() API,but when the application is minimun,the picture is pure black and I think the reason for that phenomenon is that the OS hasn't storage the Interface data. I wonder if there are some API to get the application interface when the application is not in the front of the screen even is minumum.

Sorry for my poor English and I feel great grateful for your help and attention.

Posted 15-Apr-11 1:17am

wb_program

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wb_program 15-Apr-11 7:54am

I have tried ShowWindow following what you have told me,but I can see a flash on the screen.Is it avoidable?I intended to get the Interface "quitely",just like the application is not minumum.
I am really appreciated for your kind help.

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#realJSOP · Answer 1 · 2011-04-15T01:28:00

Solution 1

Well, "print screen" does exactly that. Since the window is minimized, there's no presence on the screen, and you get a black image. You probably have to normalize (or maximize) the application in question, "print" the screen, and then return it to its minimized state.

Posted 15-Apr-11 1:28am

#realJSOP