Comments by Trapper-Hell (Top 52 by date)

If this has solved your question, kindly mark it as Accepted Answer, otherwise provide more detail so that we may be able to assist you further. Thanks.

Yes I am aware of that function. But how does that help me in loading the DLLs to the same assembly that I am about to load / or in such a way that the loaded assembly can access them?

Posting a screenshot link might help us identify the application responsible for this. However do not worry, this button is visible on your machine due to an application that you are using. If you distribute your application, that button should not be present on other machines :)

I am not too familiar with the CodeProject rules that may go against this, but there are many image hosting sites, such as TinyPic and many more. Upload to one of these and paste the link to the image...

Yeah a screenshot would definitely help. However I am thinking that this is not related to the form you are developing itself, but to a theme / application that is interfering / adjusting the form handle. Is the same button visible on other machines (if you can test it on other PCs)?

I know I could have searched, but I asked you to form a complete solution. That still didn't answer whether you consider that CPU-expensive or efficient. I have however taken the liberty to test it myself (with code I had found through a Google-search in the mean time) and yes it does appear to work well, even though I believe I'll have to take a couple of readings before determining whether CPU usage has really been reduced.

Nonetheless, I'm going to accept yourself for taking the time to reply, and for suggesting a relatively good idea.

You are correct. I meant to say user logon. My bad.

Can you provide any sample code for the CPU polling? And will the polling itself be expensive?

I'm going to go head and assume that you don't know the rest - either because of my lack of description or idk. In any case, I guess you did a really good job in answering my original question (I guess) and providing sample code - thus you are awarded the accepted solution. Thanks.

I am fully aware that this is not the best approach to pursue, but alas, there is not much choice given the circumstances. I was hoping for a more complete answer, since I may not have phrased it so well originally. If you have no idea as to how the rest of the bytes are becoming as such, you can simply say so. You already did a great job in explaining the rest - I was just wondering if you had any idea about this part of the mystery...

I don't know if this is a flaw in the current implementation or not then, but as I understand the end functionality is well. What this is all about is getting a different type of key from a supplied key - so I really don't know if all this is coincidentally working or just intended, but I'm trying to achieve the same functionality (i.e. result-wise).

As I understand, k.W is able to contain 80 bytes is because the struct sha1_key is declared to contain an array of size 80. However as to how it is getting those values, I really don't know...

Hi Philippe,

Thanks for your comment. To be honest, I have no idea why it's declared as unsigned long but filled with char instead. However it is performing the required results (even if internally if code-wise it wasn't created through the best approach. No point in fixing the C++ code now since the idea is to implement it in C#.

Yes I have. Basically the method (and the link you provided) seem to convert four bytes as a 32-bit unsigned integer.

And this works well for setting the value of k.W[0] = 875581507. This also works for k.W[3] getting value 128 from BitConverter.ToUint32(buffer, 12).

But what about k.W index 16+ ? What values are they getting?

- Worth noting, that when the buffer gets cast to type sha1_key, the 'k.W' unsigned long array is 80 elements long.

Wow! Thanks pwasser. As for the 1st element, it works exactly as I wanted it to!

But what has happened to the rest of the elements in the array? For example buffer[3] = '4' (byte 52), but k.W[3] = 128 etc.

I'm trying to port the original C++ code to C#. The code shown in my question is mostly in C++ (only after the Edit: tag is my C# code).

The answer helps answer one of my queries, but I think it is not sufficient for me to solve the problem I'm encountering.

Thanks for pointing out that in C# chars are Unicode, but what changes shall I make then to match the C++ functionality?

Thank you for your prompt response!

So this means that the 0th element contains the original chars appended (as hex)? What about the rest of the elements?

How can I achieve something similar in C# ?

I have edited my question to reflect my C# code so far.

Thanks :)

Great insight and descriptive answer. Also thanks for your thoughts about how the textbox might actually work, and for suggesting FCL.

Researching on what you have said, I can create a custom Textbox (inheriting the base Textbox) and be able to handle the WndProc events then. So yes, that definitely does answer the question.

If you would like, for the sake of being thorough, can you kindly provide more insight on which P/Invoke entry points to use through the alternative methods mentioned - and how the GetMessage / DispatchMessage differs from the the WndProc message?

I will accept your solution though for the time taken on this issue and the thoroughness in your answers. Thank you so much :)

The reason why I want to handle the key events through the WndProc is to get the Scan Codes and Virtual Key codes, and it seems to be far more practical to retrieve those values through the WndProc. However, ideally I would be able to display the characters being typed anyway (besides tracking their scan & virtual key codes).

If you come up with any idea on how this can be established let me know. I am however willing to accept your answer as the solution.

Correct! I removed the textbox and the WndProc started working correctly (showing the 'Test' message box).

I have then re-inserted the textbox and enabled the form's KeyPreview property, however it is still not capturing the keys in the WndProc. Is there a way to capture the keys in WndProc while having the textbox focused?

Thanks a lot!

I updated the question to include the complete code of the class (form). There is nothing much to it really, since it's just meant as a simple test. I will use your application, since it seems really useful, but for now I'm just trying to understand why the WndProc is never having a Msg equal to the set of integers I defined.

Thanks

Your project seems really detailed and should also prove to be helpful for my application. However, can you kindly point out what I have done wrong or why this is not working? Thanks

If you had told me earlier that you do not have enough information I would have gladly provided you with more.

Simply create a stub that calls the SendInput method through P/Invoke and supply Scan Code: 43 Virtual Key Code: 222. On EN-UK it should display # while on EN-US it would probably display \.

Thanks,

Good morning,

Thank you for the time you have taken on this matter. And I am glad that you understand the nature of my problem, and have accepted it as a problem - rather than an abuse of UI. However I do not think this has actually solved my problem, since I am still none-the-wiser on how I can remedy this problem.

What kind of "keyboard replacement" can we use? The use of a virtual / on-screen keyboard would not be acceptable due to its lack of constant usability.

Thanks,

I'm glad you understand my point, and yes you mention some valid points about the keyboard layouts and keyboard states. Let us assume that I am able to set both keyboard states as identical (ensuring that Caps Lock is off on both computers and Num Lock is on on both etc etc) and that these won't change while the process is running, how can I go about ensuring that the output on the remote computer is the same as the character input on the local computer? (Even if the keyboard layouts are different). I can set the remote keyboard layout the same as the local keyboard layout, but I was hoping for a less dirty approach.

Another idea that during startup, the server simulates some key codes (and determines the actual output character) and then sends these results to the client so that it may be able to perform some mapping of these key codes to its key codes that can match the original output characters). So, for example if the server was able to generate # with Virtual Key Code 222, the Client also generates a number of Virtual Key Codes and checks which one of those was able to produce #, so that it may then interpret the 222 Virtual Key Code as necessary for it to produce #. (I hope I have been able to explain myself well - although this feels like overkill).

[P.S. I am going to sleep, so I will see your response first thing in the morning, and reply accordingly]

Thanks and good night.

Maybe I did not explain myself well enough or maybe SendInput is not the way to go.

Imagine this, you are using this application I made to remote-control another computer. Now you are pressing keys on your computer (through this application) so that these are then sent to the remote computer (and another application running remotely) which is able to simulate these key presses.

Therefore if I was to press "This is a test", I would see "This is a test" on the remote computer. This works fine. The problem is with certain keys that vary according to keyboard layouts / regions, such that if I were to type "C# is great!", it would appear as "C\ is great!" on the remote computer. This is not a chat application, so I do not want to send strings, I want to send commands so that these keys are then simulated on the remote computer to emulate the actual keys / characters.

Dear Sergey,

That's actually what I'm using at the moment. I had used the SendKeys method in C# earlier, however this sample app I am using to monitor the keys being pressed and simulate them again uses the SendInput entry point in the user32.dll and I have tried passing in both the captured Scan Codes and Virtual Key Codes / the Scan Code only / the Virtual Key Code only, but the resultant character being displayed is not the original character. The demonstration I have mentioned above of the # and the / characters were simulated using the SendInput method.

Thank you for the note with regards to P/Invoke and APIs being platform-specific, but I have no problems running this on Windows only. Ideally I could do without having to use P/Invokes and stuff, but if that's the way to do it, so be it. I just want the pressed characters to appear exactly as pressed on the remote computer.

Thanks again.

That totally passed me - I can't get used to it yet. *Feels dumb* Sorry and thanks for all the support :)

XmlDocument doc = new XmlDocument();
doc.Load("C:\\\\xml.xml");

XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("x", "urn:schemas-upnp-org:device-1-0");
string deviceType = doc.DocumentElement.SelectSingleNode("./x:device/x:deviceType", nsmgr).InnerText;
int deviceCounter = doc.DocumentElement.SelectNodes("./x:device//x:deviceType").Count;

That's the code I'm using the XML I submitted. It throws an XPath Exception with the following message: "Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function."

Sorry to be bothering you again, but I tried the following code:

int deviceCounter = doc.DocumentElement.SelectNodes("./x:device//x:deviceType").Count;

However that gives an XPathException. What am I doing wrong here?

That about sums it all up :) Thank you for your time!

Great observation! I wrote the end tags myself since the true XML was too long, and I just extracted the important aspects of it. Please ignore the erroneous tag in the end (I revised it in the original post).

With regards to your proposed solution, it worked :D So I'm quite glad! Before I accept the solution, can you kindly explain why you had to add the namespace (and its importance)?

And finally, there are other <deviceType> tags that are children of other tags (under some branch under the <service> tag). Is it possible that I search for all <deviceType> tags irrelevant of their position within the document?

Can you possibly try the provided sample XML yourself to see if you can extract the text?

I am not getting any errors on the lines posted. It all seems to work fine, however the node variable remains null. So if I were to add a line like this afterwards:

string extension = node.ChildNodes[0].InnerText;

I'd get a NullReferenceExecption since the node variable remains null.

I did place a breakpoint to go through the process but I'm not sure what I'm supposed to notice.

The code thus far is fairly simple:

------------

XmlDocument doc = new XmlDocument();
doc.Load("C:\\\\IGD.xml");

XmlNode node = doc.SelectSingleNode("deviceType");

------------

After going over the third line, the node variable remains null. I've tested that the doc is loaded fine and it would seem so, but it cannot select the tag. Could it be because the first line of the XML is non-standard XML ?

I'd have preferred a more tailored solution rather than a link, however I have considered the submitted link and tried the following line of code:

XmlNode node = doc.SelectSingleNode("deviceType");

However the node variable is null.