capture selected or highlighted text in c#.net windows application

Hi,
i am developing windows application in c#.net.
I need to be able to copy the text from any application or document where text can be highlighted or selected(.txt, .doc, .pdf, html, .chm, .hlp, ppt, xls).

I think it is possible. but how it is possible?

appreciate any help.
Thanks in advance
nissiinfotechpvtltdAsked:
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abelConnect With a Mentor Commented:
You mean, I think, you need to be able to paste the text, is that correct? You can do so by using the clipboard functions:

// get text from clipboard, which a user copied in another app
string clipBoardText = "";
if(Clipboard.ContainsText())
    clipBoardText = Clipboard.GetText();

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nissiinfotechpvtltdAuthor Commented:
Hi,
i am developing windows application in c#.net.
how to capture selected or hightlighted text from other applications such as pdf, chm,hlp etc..
It is possible. there are many softwares to do it.
how to do it?

pls help me
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abelConnect With a Mentor Commented:
I believe I just explained that. Or I don't understand you correctly. If you want to do the copy from your application, you can use a SendKeys("^{C}"), which will send the Ctrl-C (copy) to the other application, if it has the focus.

Other methods may exist, but they can become extremely complex, as it highly depends on what kind of application, what kind of windows / edit classes (window-classes, not object-classes) they use and whether they are accessible from another thread. If the behave neatly, you can try sending messages to the window that is a textbox, the easy thing would be to use a WM_COPY message, but that may not be enough. If SendKeys does not work, you can use this post: http://bytes.com/groups/net-c/255335-get-selected-text-other-process (see below). It will work on the majority of cases, but not all.
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abelCommented:
Use want to copy text by sending keys. First answer shows how to do it without, second shows how to do it with and gives other methods as well. Suggestion: points split between http:24431121 and http:24421375
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