Keyboard input handle problem - C# Discussion Boards

Richard MacCutchan27-Oct-10 2:51

27-Oct-10 2:51

You cannot read a PDF file in this way. A PDF file is a structured file containing objects that define pages, strings, images, fonts etc, with an index at the end of the file that allows quick random access to each object. You can get a copy of the PDF specification[^] from the Adobe web site, or use one of the free PDF libraries such as iTextSharp[^].

Just say 'NO' to evaluated arguments for diadic functions! Ash

Re: Reading PDF data from Byte Stream

fjdiewornncalwe27-Oct-10 2:54

fjdiewornncalwe

27-Oct-10 2:54

How do you intend to define the location and content of the string you want to capture? I ask because the pdf format converted to a byte array isn't a plain text stream, it is binary data, which will make handling the data potentially problematic.

I wasn't, now I am, then I won't be anymore.

Powershell question: How to print only the current folder name?

melwyn27-Oct-10 0:01

melwyn

27-Oct-10 0:01

Hi,
Sorry for asking a powershell question. This should be easy for an expert.

Suppose I'm in the folder C:\Windows\System32 . I want to print out only "System32".

I have found commands that give the entire path, but I want only the last bit.

Thanks,
Mel

Re: Powershell question: How to print only the current folder name?

Sauro Viti27-Oct-10 0:17

Sauro Viti

27-Oct-10 0:17

You have posted the same question on 4 different forums; please, don't do it!
The best when asking something is to choose the forum that better matches your subject, and post a unique question explaining as better as possible what is your problem.

Thank you!

Couldn't reder the video capture stream. hr=0x80070057

mengnancy26-Oct-10 23:30

mengnancy

26-Oct-10 23:30

I was trying to use the ObjectTracker.exe demo but it keep giving me this error when press the stop button:

Couldn't reder the video capture stream. hr=0x80070057
The capture device may already be in use by another application.
The sample will now close.

Any ideas?
Thank you.

cross-post

Luc Pattyn27-Oct-10 0:58

Luc Pattyn

27-Oct-10 0:58

And how is this a C# question?

Please don't cross-post, you already asked in the article's forum.

Hmmm | :|

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: cross-post

mengnancy27-Oct-10 1:02

mengnancy

27-Oct-10 1:02

Sorry, I have already realised that I had posted the question to the wrong place.

Keyboard input handle problem

Emmet_Brown26-Oct-10 21:22

Emmet_Brown

26-Oct-10 21:22

Hi all,

I want to close the from with a keyboard input 'K' but I cannot handle the input.
Before asking here, I've done lots of researches on web and especially on msdn.

This is not the first time I've been using KeyDown event but now I'm on a new computer and I cannot figure out why this time it does not work.

my code is simple:

private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.K)
            {
                this.Close();
            }
        }

and on the designer side:

this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);

All other events work just fine, like MouseOver, MouseDown or MouseMove

but when it comes to KeyDown or KeyPress, it doesn't work

any suggestions? Frown | :(

Re: Keyboard input handle problem

RaviRanjanKr26-Oct-10 21:59

RaviRanjanKr

26-Oct-10 21:59

you need to enable KeyPreview of Form for which you want to write code

as

this.KeyPreview = true;

and then write

private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.K)
            {
                this.Close();
            }
        }

private void Form1_KeyPress(object sender, KeyPressEventArgs e)
      {
          if (e.KeyChar == 'k')
          {
              Close();
          }
      }

Both Work fine

Re: Keyboard input handle problem

Emmet_Brown26-Oct-10 22:01

Emmet_Brown

26-Oct-10 22:01

It worked

Thank you! Big Grin | :-D

Application events

jenya726-Oct-10 21:12

jenya7

26-Oct-10 21:12

Is it possible to get events of a form that belongs to other application?
I was looking for API function to get a handle of the window then to get events but found nothing.

Re: Application events

Rajesh Anuhya26-Oct-10 21:17

Rajesh Anuhya

26-Oct-10 21:17

May be you can't access the events of other applications , But you can get the windows events..,

go through the below link .., you will get an Idea...
http://msdn.microsoft.com/en-us/library/microsoft.win32.systemevents.aspx[^]

Rajesh B --> A Poor Workman Blames His Tools <--

Re: Application events

Keith Barrow26-Oct-10 21:27

Keith Barrow

26-Oct-10 21:27

Assuming you can't change the other appication, the only way that I know is through the Windows message queue.
Windows Message Handling - Part 1[^]

You need to get the windows handle (the HWND pointer IIRC) of the application you want to interact with, then hook into the queue filtering messages aimed at that window. Finally, you need the pointer of the button that you want to observe, and react to any ON_CLICK event raised by it.

Go to Start Menu ---> Microsoft VSnnnn --> Visual Studio Tools --> Spy++. Spy ++ allows you to watch the message queue for a window through a GUI, so you can see better what is going on.

I had a requirement for a WPF project of mine to interact with a VC++ 6.0 application, via the message queue. We were lucky that the C++ app was written in-house, so we arranged for a handshake between our two applications (passing the HWND handle to eachother). This meant we could raise events and pass small amounts of data directly across the message queue. This avoided the need to figure out the HWND of the buttons, as these changed each time.

Sort of a cross between Lawrence of Arabia and Dilbert.[^]

Re: Application events

jenya726-Oct-10 21:32

jenya7

26-Oct-10 21:32

Thanks a lot , i'll try.

OO training

abhithcker26-Oct-10 19:47

abhithcker

26-Oct-10 19:47

Can someone please suggest a good seminar for OO training?

Thanks

Re: OO training

Rajesh Anuhya26-Oct-10 20:03

Rajesh Anuhya

26-Oct-10 20:03

Post Your Question Here

http://www.codeproject.com/Lounge.aspx[^]

Rajesh B --> A Poor Workman Blames His Tools <--

Re: OO training

leppie26-Oct-10 20:37

leppie

26-Oct-10 20:37

Ermmm no, dont post your question there!

Re: OO training

RaviRanjanKr26-Oct-10 21:08

RaviRanjanKr

26-Oct-10 21:08

You need follow this article

How I explained OOD to my wife[^]

A great article for OOD
written by Codeproject MVP

C# - Send Message to minimize window game. How i can do this?

NaiiD26-Oct-10 10:02

NaiiD

26-Oct-10 10:02

Hello

If anyone know, how I can send message eg: "Sell Items", to game: Metin2, when game is minimized?

WIW - What I Want:

1. Click "Y"
2. Write "Sell items"
3. Click Enter
4. Click Mouse on position X, Y

I try with Sendmessage, but it work me only on activate window. When i minimize game, my program don't work. ;(

Please Examples. Wink | ;)

)

Thanks, and sorry for my english. Smile | :)

Re: C# - Send Message to minimize window game. How i can do this?

NaiiD27-Oct-10 6:33

NaiiD

27-Oct-10 6:33

Please help! Frown | :(

can someone tell me how can i detect an ellipse in BTMP file?

inayathussaintoori26-Oct-10 9:46

inayathussaintoori

26-Oct-10 9:46

hello
i am doing face detection project without buit-in libraries.
so i got the idea that whole face is an ellipse and further eyes and mouth are ellipse as well. if i detect ellipse in bitmap file, so then i can detect face in live video.
i have googled for this as well, but didn't get success.
please help me that how can i detect that the picture contains ellipse.
or any other suggestion about face detection will be appreciated.
thank you very much.

Re: can someone tell me how can i detect an ellipse in BTMP file?

DaveAuld26-Oct-10 9:50

DaveAuld

26-Oct-10 9:50

If you search for Motion Detection in the article search, there are several articles that may help you build an understanding.

There are a few articles that you should maybe start to read first;

Motion Detection Algorithms[^]

http://www.codeproject.com/KB/audio-video/motion_detection_wc.aspx[^]

http://www.codeproject.com/KB/audio-video/haar_detection.aspx[^]

http://www.codeproject.com/KB/recipes/BossWatcher-Motion_Detect.aspx[^]

Dave
Find Me On: Web|Facebook|Twitter|LinkedIn

CPRepWatcher now available as Packaged Chrome Extension, visit my articles for link.

1212

Luc Pattyn26-Oct-10 9:53

Luc Pattyn

26-Oct-10 9:53

Hi Dave, you score 1212, that is 3 * 404.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, and improve readability.

Re: 1212 [modified]

DaveAuld26-Oct-10 9:55

DaveAuld

26-Oct-10 9:55

I know, damn copy and paste..........should be fixed now.
Mad | :mad:

[edit: deleted some mads, have calmed down now Roll eyes | :rolleyes:

Note to self, use preview more before submit, been caught out by bad c+p too often....]

Dave
Find Me On: Web|Facebook|Twitter|LinkedIn

CPRepWatcher now available as Packaged Chrome Extension, visit my articles for link.

modified on Tuesday, October 26, 2010 4:04 PM

Re: can someone tell me how can i detect an ellipse in BTMP file?

inayathussaintoori26-Oct-10 11:37

inayathussaintoori

26-Oct-10 11:37

thank you for help and i saw your suggested links
but Motion detection and ellipse detection are two different things.

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