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What is inside Windows SDK?

- by AKN

For developing programs for windows, we need windows SDK. I understand that this SDK is what helps to create windows and handle window events and all that. I suppose it also enables us to manipulate with files and registries. (Does the same SDK is the reason for thread creation and handling?) All that is fine! I would like to know what are the files and libraries that come as a part of this SDK. Also does it come when I install the OS or when I install editors like Visual studio? Sometimes I see links to windows SDK separately as such. Is it same as the one that I get when installing Visual Studio or has something more than that.

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How to invoke client ActiveX via javascript

- by Captain Kidd

Hi I want to let server to invoke client ActiveX via javascript. The script work well as it run on my local system. Then I place it into Apache Server and it's malfunction. Script: <object id="lv_obj" classid = "CLSID:30A92485-94D2-4CBA-AC32-EF276B7F777B" CODEBASE="" ></OBJECT> try { document.all.lv_obj.Init("PCS_Tes"); } catch (err) { window.alert("????: " + err.message); } I guess the reason is script on server can't invoke user client ActiveX. If I need config something on Apache?

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Why does Opera parse my web page as XML?

- by Adrian Grigore

I just tried viewing my website http://www.logmytime.de/ in Opera (version 10.50) for the first time and for some reason it gives me an "xml parsing failed error" and refuses to display the web page. I can choose to "Reparse the document as HTML" and then the page works fine, but that's hardly a solution to my problem. The weird thing is that the error still occurs after setting a HTML (instead of XTHML) doctype: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> I checked the source output from the browser to make sure I did not make any mistake. I even viewed the same web page in Firebug and it shows a Content-Type of text/html; . So, why does Opera still try to parse my web page as XML? Thanks, Adrian

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Networking Multiplayer games in Cocoa?

- by Conor Taylor

I have made this game for Mac OS, but I realised that i need to make it better with multiplayer. Im an experienced Cocoa developer (so please, no RTFM's) but for some reason I never even touched on networking. I was wondering how I could send game date from com1 to com2, and vice versa, over different wifi networks. Cheers, Conor Edit: When I say different wifi networks, I mean no bonjour. I want to be able to play the game in the US with a guy in china!

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Java App Engine - ranked counter

- by Richard

I understand the sharded counter, here: http://code.google.com/appengine/articles/sharding_counters.html The problem is that a simple counter will not work in my application. I am sorting my entities by a particular variable so I am returned not so much a count, but more of a rank. My current method is: SELECT COUNT(this) FROM Entity.class WHERE value <= ? Result + 1 is then the rank of the parameter in relation to the value variable in the persistent Entity objects. The limitation of this is the highest rank being returned is 1001 because count() can give a maximum of 1000. The reason I cannot store the rank on the Entity object is that the ranks are updated very often, and re-setting this rank variable would be much too costly. Any ideas on the best way to accomplish this?

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Cross Platform build

- by Neeraj

I have an application in which we use a hand-made build system.The reason for this is portability, the application should be portable on Linux/Mac/Windows. There are some port-specific files that are not updated by the deafult build system. What I do now is update the files manually or have a script do this. However I am thinking of switching to cross platform build system like cmake or scons. Are their associated problems wrt portability? Will it pay in long run? and if so what should be my choice "cmake", "scons" or some other(if any?). Thanks,

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RichFaces rich:panel header not appearing

- by Mark Lewis

Hello I specified this <rich:panel> <f:facet name="header"> Panel #1. Changing Style Synchronously </f:facet> Each component in the RichFaces has a pre-defined set of classes you can manipulate with. If defined, those classes overwrite the ones come from the skin. </rich:panel> from the RichFaces demo, in my JSF page and no header appears, although I've nothing in my css which would interfere. What might be the reason for this? Thanks

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How to make a POST request with python-webkit?

- by shakaran

Hi, I new using python + webkit. I need make a POST request with webkit, but I dont know how to it. I use python-webkit because my app load a form on the GUI (for vote, comments and send more data) and I need post all these data with a POST request and load the html result send for the server to my GUI app with python-webkit. I have only this example with urllib: #!/usr/bin/python import urllib2, urllib import httplib server = 'server.somesite.com' data = {'name' : 'shakaran', 'password' : 'Only_I_know'} d = urllib.urlencode(data) headers = {"Content-type": "application/x-www-form- urlencoded", "Accept": "text/plain"} conn = httplib.HTTPConnection(server) conn.request("POST", "/login.php", d, headers) response = conn.getresponse() if response.status == 200: print response.status, response.reason print response.getheaders() data = response.read() print data conn.close() I need a simple example with webkit. I look in the documentation for Webkit.HTTPRequest http://www.webwareforpython.org/WebKit/Docs/Source/Docs/WebKit.HTTPRequest.html I try with webkit.NetworkRequest() but I don't know how to it. Some help? Thanks

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Async actions inside Silverlight Method - returning the value

- by tyndall

What is the proper way to call an Async framework component - wait for an answer and then return the value. AKA contain the entire request/response in a single method. Example code: public class Experiment { public Experiment() { } public string GetSomeString() { WebClient wc = new WebClient(); wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted); Uri u = new Uri("http://news.google.com/news?pz=1&cf=all&ned=us&hl=en&topic=t&output=rss"); wc.DownloadStringAsync(u); return "the news RSS from Google"; } private void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { //don't really see how this callback method makes it able // to return the answer I'm looking for on the return // statement in the method above. } } MORE INFO: The reason I'm asking this that I have a project I'm working on where I'd like JavaScript code in the browser to use Silverlight like a Facade/Proxy to Web services and complex calculations & operations. I'd like to make the calls to the [ScriptableMembers] in Silvelight synchronously. I don't want Silverlight to callback into the browser's JavaScript

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FileUtils.mv adding linebreaks in Windows

- by Lowgain

I am streaming wav data from a flash application. If I get the data and do the following: f = File.open('c:/test.wav') f << wav_data.pack('c'*wav_data.length) f.close The wav file works perfectly. If I do this: f = Tempfile.new('test.wav') f << wav_data.pack('c'*wav_data.length) f.close FileUtils.mv(f.path, 'c:/') The file is there, but sounds all garbled. Checking in a hex editor shows that everywhere the working file had an 0A (or \n), the garbled version had 0D0A (or \r\n) I am using this in conjuction with rails+paperclip, and am going to be using a combination of Heroku and S3 for the live app, so I am hoping this problem will solve itself, but I'd like to get this working on my local machine for the time being. Does anybody know of any reason FileUtils.mv would be doing this, and if there is a way to change its behaviour?

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Why is J2ee/EJBs a dying Trend?

- by Taranfx

I might be wrong on this, but I no longer see heavy Business and Web services being hosted using J2ee technologies (Especially EJBs). Having known the power and scalability of J2ee applications, what is keeping developers/decision makers to restrict themselves to Core Java (POJOs) or even other web technologies like PHP, python. Is it the development time? Is it the Ease of configuration? (I feel this should not be a strong reason with Java EE 6, things are simplified) Of course scripting languages are faster to develop, we cannot ignore the fact that they are inherently not-as-scalable as Java Applications are (using App servers)

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Problems with animateAlong in IE7

- by Andrei

Hi there, I'm having trouble making a simple shape move along a path in IE7 (the only version of IE I tried, actually). The following code works fine in chrome and firefox, but not IE. I couldn't find an obvious reason, has anybody seen something similar? canvas.path(rPath.path).attr("stroke", "blue"); var circle = canvas.circle(rPath.startX, rPath.startY, 5); circle.animateAlong(rPath.path, 3000, true); My rPath variable has the path and the starting point coordinates. Microsoft script debugger points to this line as the one where the code breaks: os.left != (t = x - left + "px") && (os.left = t); (line 2131 inside the uncompressed raphael.js script file, inside Element[proto].setBox = function (params, cx, cy) {...}) Any ideas? Any experience (good or bad) with raphael's animateAlong in IE7? TIA, Andrei

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MKMapView not centered on pin

- by Val Smith

Hi all, I have an mkmapview that i'm currently adding pins to, but for some reason when I call [mapView setRegion:[detailItem coordinateRegion] animated:YES]; the pin is off-centered (toward the right side of the screen) on the map. Here is the code for [deailItem coordinateRegion]: - (MKCoordinateRegion)coordinateRegion { MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } }; region.center = self.coordinate; region.span.longitudeDelta = 0.0075f; region.span.latitudeDelta = 0.0075f; return (region); } I'm setting the coordinateRegion's center to the object's x,y coordinate, so why is it off-center on the map? I feel like there's something I'm missing here... ::Val::

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What are the CS fundamentals behind package/dependency management?

- by Frep D-Oronge

Often I hear about situations where companies are developing extensable in house software (the dreaded enterprise 'framework') which is supposed to support multiple 'plugins' from diffirent teams. Usually this ends up being a half baked solution that does not really work due to compatibility prolems between addins, or between addins and the framework itself. Usually this means QA have to 'rubber stamp' a global set of versions accross all plugins, or more usually plugins are released and stuff breaks in nasty ways. This problem has been solved before however, for example the package management systems like apt for debian linux. I suspect that the reason it works is that it is built from the start on a known 'Computer Science-y' concept. My question is what is it?

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Why aren't APT generated classes being compiled by Eclipse?

- by yamsha

In my Eclipse project I'm using a third-party annotation processor, Hibernate Metamodel Generator to be exact. The annotation processor works as expected and generates files as specified by the spec. These files are generated inside the directory of the Eclipse project under a "gen" folder. In the project properties this is correctly reflected since two source folders exist - "src" and "gen." However, when the project is built for some reason all the [generated] sources under "gen" are not compiled (checking the "bin" directory I only see .class file from the "src" directory). Does anyone know why this is happening?

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ComboBox.SelectionChanged doesn't catch the first selection

- by trnTash

I need to fill textboxes depending on the item selected in a combobox. I fill combo async and in Completed event I have the following code combo.ItemsSource = e.Result; combo.DisplayMemberPath = "Name"; combo.SelectedIndex = -1; Then in the SelectionChanged event of the combo, I catch the selected object MyClass mc= ((ComboBox)sender).SelectedItem as MyClass; tbxName.Text = mc.Name; ... However, when I load the project and select any event for the 1st time, NOTHING happens. Every other time (2nd, 3rd, nth) the data is correctly caught and displayed. So I need to know why the combo doesn't catch the first selection? That's the reason I have the code combo.SelectedIndex = -1 (when the app loads, combo is empty - selection -1 works).

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Reading HttpURLConnection InputStream - manual buffer or BufferedInputStream?

- by stormin986

When reading the InputStream of an HttpURLConnection, is there any reason to use one of the following over the other? I've seen both used in examples. Manual Buffer: while ((length = inputStream.read(buffer)) > 0) { os.write(buf, 0, ret); } BufferedInputStream is = http.getInputStream(); bis = new BufferedInputStream(is); ByteArrayBuffer baf = new ByteArrayBuffer(50); int current = 0; while ((current = bis.read()) != -1) { baf.append(current); } EDIT I'm still new to HTTP in general but one consideration that comes to mind is that if I am using a persistent HTTP connection, I can't just read until the input stream is empty right? In that case, wouldn't I need to read the message length and just read the input stream for that length? And similarly, if NOT using a persistent connection, is the code I included 100% good to go in terms of reading the stream properly?

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Scrolling textboxes programmatically using WndProc messages.

- by Hannes Nel

Hi, I'm trying to scroll a textbox using the form's WndProc method. The code I've come up with so far, after scouring the internet, looks like this: private void ScrollTextBox() { scrollMessage = Message.Create(TabContents.Handle, 0x00B6, new IntPtr(0x0003), new IntPtr(0x0000)); this.WndProc(ref scrollMessage); } where TabContents is a TextBox. For some reason, nothing happens when i call this method. I'd like to know why. I realise that i can accomplish the same with the MoveToCaret method, but I'm curious why this is not working.

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How do you prevent brute force attacks on RESTful data services

- by Adrian Grigore

Hi, I'm about to implement an RESTful API to our website (based on WCF data services, but that probably does not matter). All data offered via this API belongs to certain users of my server, so I need to make sure only those users have access to my resources. For this reason, all requests have to be performed with a login/password combination as part of the request. What's the recommended approach for preventing brute force attacks in this scenario? I was thinking of logging failed requests denied due to wrong credentials and ignoring requests originating from the same IP after a certain threshold of failed requests has been exceeded. Is this the standard approach, or am I a missing something important? Thanks, Adrian

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Bad access on removing the record from the contacts

- by Mohammed Sadiq

Hi all, I am facing a issue in removing the ABRecord . The code that i use is as follows : BOOL isRemoved = ABAddressBookRemoveRecord(addressbook, record, &error). But I am receiving the following call stack : *#0 0x005355bd in moveToRoot * *#1 0x005bbeb6 in sqlite3VdbeExec * **#2 0x0058e7e7 in sqlite3_step ** *#3 0x000800ad in CPSqliteStatementSendResults * *#4 0x00082dcd in CPRecordStoreProcessStatementWithPropertyIndices * *#5 0x00082e1d in CPRecordStoreProcessStatement * *#6 0x325b4b63 in ABCRemoveRecord * *#7 0x325c578a in ABAddressBookRemoveRecord * I searched , and this is the only way to remove the records from the contact . I dont know the reason for this access error . Any hep will be greatly appreciated .. Best Regards, MOhammed Sadiq.

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Multiline TextBox control in WPF

- by Stian Karlsen

For some reason I need the content of a TextBox to span multiple lines, and I need this to be defined directly in XAML. I know I can set TextWrapping="Wrap", and I will do that too, but what I need to do is add newlines anywhere I want in the TextBox. Can this be done in XAML? I know the following example won't work, but what I want is something like this: <TextBox>Test1 \n Test2 \n Test3</TextBox> .. and then have these displayed on three lines. Test1 Test2 Test3

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What's the easiest way to sort an EF4 EntityCollection<T>?

- by Will

I'd love to add some sorting to an EntityCollection that is bound to an ItemsControl (in xaml). I'd also like to do it as simply as possible. It appears that this is not possible. If I wrap the collection in a "sorted" version of the collection property within the Entity I lose collection change notifications. I can't use a CollectionViewSource because the entity collection's BindingListCollectionView does not support sorting for some goddamned reason (note: I've seen the blog post with the "dirty" hack to get around this, so please don't answer with that kthx). Is there a simple (couple lines of xaml, couple lines of code, whatever) way to achieve this??

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JDBC connections: How to specify the port for data-transfer?

- by LeO

I wanto to run my JDBC-connection (either Oracle or MSSQL) through a proxy-server. Reason for this is to have additional controls of the traffic, especially for developing. I know, I could specify the proxy, which runs on my machine, and the port in the connection-string. But the specified connection-settings are only taken as some kind of handshake to agree on which port the data is finally transferred. And this is defenitly not the port which I have under proxy-control. So, does anybody have an idea, how to specify the port for the data-transfer? I would prefer if this could be done in the connection-string. The same issue applies for Oracle and MSSQL. Thx LeO

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window.open("c:\test.txt") from Silverlight

- by queen3

I'm trying to open local file from Silverlight. I try Window.Navigate("c:\test.pdf", "_blank") and invoking JavaScript like this: window.open("c:\test.pdf", "_blank") Both give "Access is denied". However it works in plain HTML when I do <input type="button" value="test" onclick="window.open('c:\test.pdf', '_blank')" /> Is it Silverlight security restriction? Can I open a local file in a browser from Silverlight application? The reason behind this is that users store local paths and want to open those files from the app.

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AJAX vs AHAH Is there a performance advantage?

- by LanguaFlash

My concern is performance, is there a reason to to send the client XML instead of valid HTML? Like most things, I am sure it is application dependent. My specific situation is where there is substantial content being inserted into the web page that has been pulled from a database. What are the advantages of either approach? Is the size of the content even a concern? Or, in the case of using XML, will the time for the Javascript to process the XML into HTML counterbalance the extra time that would have been required to send HTML to start with? Thanks, Jeff

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