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PInvoke is short for platform invoke. It allows CIL, which is managed code which uses the .Net framework, to call native code, which is basically, C++, C or assembly code. It's commonly used to do pointer arithmetic (in VB.Net) or work directly with Windows.
Most of the people who replied to you are usually helpful. It's just that most of the information I gave you, you could have found out by looking the .Net Framework up on Wikipedia. No offence 
Between the idea
And the reality
Between the motion
And the act
Falls the Shadow
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I voted a "1" before looking at his copy/paste responses and can no longer report the message.
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sir,
can u send me all the details along with the code explanation of all properties,events and methods of each and every control in .net(vb,asp)
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There[^] you are, enjoy 
Find me 10 normal people - and I will cure them
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The original question was not well-written, and the poster failed to indicate what resources he'd tried to look at. Microsoft's documentation isn't as helpful as it could be; it would certainly be useful to have some better explanations of some common scenarios.
For example, what happens when a user presses the space bar when a particular form is the front-most window, and what factors control that behavior? What happens in various circumstances when someone interacts with a TextBox (e.g. typing a printable character, using an arrow key or shift+arrow key, control-V, control-insert, tab, enter, etc.)
I'd really like to have a guide that explained how all the events and overridable methods interact, but I'm not aware of any. Would you have any to recommend?
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The only one I know of is experience. I haven't seen any kind of print version of what you're talking about.
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supercat9 wrote: The original question was not well-written, and the poster failed to indicate what resources he'd tried to look at. Microsoft's documentation isn't as helpful as it could be; it would certainly be useful to have some better explanations of some common scenarios.
That part of MSDN can best be used as a reference-manual. I've remapped my F1-key to point there, as it loads quite quickly. It's not a good learning resource, but there's a different portal for that[^]. If you're after a specific common scenario, browse the "How Do I" video's[^].
There are some hidden nuggets in MSDN, explaining the differences between the French[^], Spanish and Polish sort-orders. My personal favorite is definitely the UX Guide[^] (also available as PDF[^]) explaining how a decent user-interface is made, and what one has to consider during the design 
supercat9 wrote: For example, what happens when a user presses the space bar when a particular form is the front-most window, and what factors control that behavior?
There's some electrical things going on, there's some things going on in the driver, some in the OS, and then some. I very much enjoyed reading the weblog[^] of Raymond Chen, learning about Messages[^] and how they are handled[^]. It's not all in the form of guides, but you can go far just by reading what's online.
supercat9 wrote: What happens in various circumstances when someone interacts with a TextBox (e.g. typing a printable character, using an arrow key or shift+arrow key, control-V, control-insert, tab, enter, etc.)
Like I said, there's some gems hidden[^] on MSDN
supercat9 wrote: I'd really like to have a guide that explained how all the events and overridable methods interact, but I'm not aware of any. Would you have any to recommend?
I'm not sure what it is that you seek; the best "guide" that I found on both events and OO is the book "Head First C#[^]".
If I interpret the question right, then you already know what an event is, how it differs from a delegate and how you replace a method in a derived class. In that case, you might be interested in the poster[^] that graphically depicts the Framework (part of the poster-pack[^]).
Ask five developers what you should learn next, and you'll get five[^] different[^] answers[^].
The only good piece of advice that I can give is to become very, very curious
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Hi Eddy,
Eddy Vluggen wrote: Ask five developers what you should learn next, and you'll get five different answers
you clearly don't need four colleagues, you provided more than five different answers all by yourself.
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Hi Luc,
"We got carried away while answering, but we enjoyed it" 
I are Troll
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Eddy Vluggen wrote: We got carried away while answering, but we enjoyed it
That's OK then!
Luc Pattyn [Forum Guidelines] [My Articles]
The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.
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Thank you for your reply. It seems very useful and worth a book-mark. I've tried Google'ing for the information various ways, but I found oodles of pages that didn't really show what I was looking for. The "hidden" MSDN page you pointed me to looks like just what I was looking for (though the other links seem worth a gander as well). I wish Microsoft would have a more useful internal link structure to make it easy to find such information. In any case, I'm glad you pointed me to it. Thanks again.
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Thanks, and you're welcome
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Hi Good Day!
I'm new in Web development using ASP.net with C#.net page language..
I have some question for those really know about the WEB SERVICE..is it really possible that WEB SERVICE send to the WINDOWS SERVICE these two parameters DATEFROM and DATETO.
The WINDOWS SERVICE execute the T-SQL which the parameter value entered by the user.
Thanks And More Power
HONORABLE
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Web-Services works on a request/response architecture. It can't do anything until there is a request for it. That said, a web-service can't send anything to a windows service.
Windows service can access this web-service to get information instead.
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It is possible - you'll have to use remoting to do this, but it is possible. Basically, you'll need to define an interface that you will use on both sides:
public interface IUpdate
{
void UpdateDatabase(DateTime from, DateTime to);
}Then, you'll implement this interface in your windows service inside a class that derives from MarshallByRefObject. To activate this object from your web service, you use code that looks similar to:
TcpChannel clientChannel = new TcpChannel();
ChannelServices.RegisterChannel(clientChannel, false);
IUpdate upd = (IUpdate)Activator.GetObject(typeof(IUpdate), "tcp://myserver:1234/UpdateClass); This example assumes that your server is called myserver, that it remotes on port 1234, and that the class that you connect to is called UpdateClass.
At this point, you can call
upd.UpdateDatabase(dateFrom, dateTo); It's that simple.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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In a simpler way you can write a small xml file to store your dates from WebService.
You Windows Service would keep polling the file and picks the dates whenever it gets the values.
Now with a more complicated implementation would be have the Remoting implementation (which is already suggested).
A bit more complicated and proper implementation might be Microsoft Message Queueing. In this way, keep one Message Queue to send your data from WebService in the Queue. Your Windows Service would pick from there. Please visit the <a href="http://articles.techrepublic.com.com/5100-10878_11-6170794.html">blog</a>[<a href="http://articles.techrepublic.com.com/5100-10878_11-6170794.html" target="_blank" title="New Window">^</a>]which will help you about messaging beween processes.
Now you decide the approach better suitable for you.
Enjoy.. 
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sir,
1)can u tell me the code how to display the entire row selected from datagridview control at runtime into textbox control
2)code for how to bind a checkedlistbox control into datagridviewcontrol without using a wizard
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Hi all, we currently have a 100k+ LOC client/server application, not yet finished but close to be ready. Suddently, our customer decided that he needs the client/server comunication to cross nat/firewall boundaries, but remoting uses 2 channels and this makes it harder. We considered using WCF (wich we *hope* allows bidirectional communication through 1 channel), but then we discovered that support for generics and interfaces in services methods is limited due to WSDL restrictions. Of course, our system is heavily based on generics and interfaces (i.e. our custom DBRM) and using WCF would require deep changes in the whole architecture (most probably months of work).
My question is: is there any other option we could consider, and what is your suggestion?
Thank you!
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Hi,
I have to create a form in VB.net that can write records on a mdb file on my website and also retrieve records from it.
I have never done any web programming, so I want to know how I can do it. Are there any sample codes available on the web? or can someone suggest me a book which explains such work.
Thanks and regards,
Neil Ranjan
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There are loads of articles available here on Code Project on using a database and ASP.NET. Alternatively, there's this section[^] on the ASP.NET site (complete with screencasts) that just might help.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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I have an application wich adds items to a listview with groups. Then, I want to sort the items within the groups by the header clicked. I've created an icomperer class and works perfect on Windows Vista (development machine). But when I put this on the running machine (Windows XP) this doesn't work, when I click a header it only flickers but doesn't sort. I'm a little shocked, and I don't know what to do.
Thanks in advance for your time.
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Hi,
First of all thanks for your support and time. I have a requirement to implement method level logging and instrumentation for my project.
what this means is , when a method runs , i need to track the time elapsed for the method. This should be happening without developer calling any code.
It should be set up in the framework( i mean i should write some code in framework which will enable logging and instrumentation and log start time and end time and elapsed time for every method in my project.
Any tips??
Thanks
Santhosh
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