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Working with Windows Registry using VB.NET[^] - Sorry- Seems like someone else already pointed you there.
MSDN[^]
People becoming wiser in order to notice the stupid things they did back in the young days. This doesn't mean that they really stop doing those things. Wise people still do stupid things, only on purpose.
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I have Filewatcher services and after 300 files I am getting this error:
Too many changes at once in directory
how can I fix it?
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Try and put in meaningful filters in your file watcher code.
If you are monitoring every change, then you are going to run out of resources very quickly.
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i do have filtering however one a month we have a job which produce more then 300 files...
my filtering...
e.FullPath.ToUpper.IndexOf("~WRD") > -1 OrElse e.FullPath.ToUpper.IndexOf(".TMP")
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In that case you have to enlarge InternalBufferSize. It's default size is 4096 (4K). You must take your number of files to proceed (plus some) and multiply it by 16 (the size of each entry in the buffer); round it up to the next 1024 (1K) and set InternalBufferSize to it...
I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is (V).
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Guys i would like to design a application that disables the keyboard.
when my application is opened or minimised the keyboard should not work and when i close it the keyboard should work as usually.How to do this?
Help Me Guys.........
PlZZZZ....
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Google for "global keyboard hook vb.net". All you do is not pass the key messgae to the next hook handler to disable the keyboare.
By the way, this does NOT work for disabling Ctrl-Alt-Del.
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I guess something like this piece of code[^] is what you want.
People becoming wiser in order to notice the stupid things they did back in the young days. This doesn't mean that they really stop doing those things. Wise people still do stupid things, only on purpose.
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Your piece of code is good And it works too but how to detect all the ascii values using this code........
For Example
How to detect Small "a",colon,braces etc.
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You have to change the following function:
Private Function HookCallback(ByVal nCode As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
If nCode >= 0 AndAlso (wParam.ToInt32 = WM_KEYUP OrElse wParam.ToInt32 = WM_SYSKEYUP) Then
Dim vkCode As Integer = Marshal.ReadInt32(lParam)
If vkCode = Keys.PrintScreen Then
Dim data As IDataObject = Clipboard.GetDataObject()
If data.GetDataPresent(GetType(Bitmap)) Then
Me.BackgroundImage = DirectCast(data.GetData(GetType(Bitmap)), Bitmap)
End If
End If
End If
Return CallNextHookEx(hookID, nCode, wParam, lParam)
End Function
instead of "If vkCode == Keys.PrintScreen Then"... you have to check wether your application is active, and forward the pressed key to it.
People becoming wiser in order to notice the stupid things they did back in the young days. This doesn't mean that they really stop doing those things. Wise people still do stupid things, only on purpose.
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I dont know How to declare functions that reads ascii characters..........
can you give me example to find small "a".
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srinivasankrishnaa wrote: how to detect all the ascii values using this code.
Since you're repeating the question, I'll repeat the answer[^].
There's not a unique key for each character available; you'd need a keyboard with 255 keys if each character would need a unique key. There's no separate key for "A" and "a". You can map a virtual key to a character using below function;
[DllImport("user32.dll", CharSet=CharSet.Auto)]
internal static extern int MapVirtualKey(int uCode, int uMapType);
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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I am developed a project in VB.NET and Database file is Inbuilt SQL server Database File In Visual Studio 2008.But I get error when open the created database "Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed" I Used Google to solve this problem but Cant Help Anymore.. So Please Give me solutions As Soon as Possible....
Thank you To All For Considerations.......
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This thread[^] has couple of solutions.
thatrajaNobody remains a virgin, Life screws everyone 
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Member 8134979 wrote: Didn't Get It..
Did you read that thread fully?
thatrajaNobody remains a virgin, Life screws everyone
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I am Creating Web application To Store Internet History Information (Like Opened Website Addresses,Browser Closing Time) From The Current System Into The Database In ASP.NET by using C# Language If Some One Have Some Idea to How To Do..? Then Please Reply ...
Thanks In Advance...
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You'd have to install an ActiveX control into the browser, and send a message when the user closes it. That wouldn't work if the browser is simply terminated though. Websites are disconnected in nature; as soon as the page is loaded, the connection is closed.
This does not sound like a security-implementation at all 
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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You could have a look into the JavaScript unload Event[^].
People becoming wiser in order to notice the stupid things they did back in the young days. This doesn't mean that they really stop doing those things. Wise people still do stupid things, only on purpose.
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You can use the onUnload event of the body .
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Hi everybody,
My application, written in vb.net VS2008, runs on a device with Windows Embedded Compact 7 operating system and for this reason uses COMPACT FRAMEWORK instead of full .NET.
It communicates with another device by DMX512 protocol via RS485 port.
When receiving data I need to catch the UART framing error and I'm not sure how to do.
The SerialPort object has the ErrorReceived event and I try to catch this event.
This is what I did in a short test app:
...
com = New System.IO.Ports.SerialPort()
...
AddHandler com.ErrorReceived, AddressOf ErrorReceived
...
Private Sub ErrorReceived(ByVal sender As Object, ByVal e As SerialErrorReceivedEventArgs)
MessageBox.Show(e.EventType.ToString)
End Sub
When I start receiving data using com.ReadByte() in a for loop, I receive all the bytes and then, very slowly, come up some MessageBox reporting the "RXOver" error (MSDN: An input buffer overflow has occurred...).
I get no "Frame" error (MSDN: The hardware detected a framing error.) but in the DMX communication the break is too long not to rise a framing error.
So: is this the right way to catch an error event for a SerialPort object?
Am I missing something?
Any suggestions would be greatly appreciated.
Thanks in advance.
modified 18-Oct-13 5:51am.
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Even though not being a Serial communication expert I'd say that there is an error with the hardware, for example a wrong Baud rate causing the buffer to overflow. Another idea to handle buffer overflows is to modify the hardware to delay the delivery of the messages sent over the Serial, or send less serial messages.
steve_9496613 wrote: is this the right way to catch an error event for a SerialPort object?
SerialPort throws an exception for occured errors, so I'd guess that it is the right way ( I did it the same way in an earlier project of mine, and it worked fine for me).
steve_9496613 wrote: Am I missing something?
The messages which get lost during the buffer overflow, I assume.
You know the world is going crazy when the best rapper is a white guy, the best golfer is a black guy, the tallest guy in the NBA is Chinese, the Swiss hold the America's Cup, France is accusing the U.S. of arrogance, Germany doesn't want to go to war, and the three most powerful men in America are named "Bush", "Dick", and "Colon."
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Thanks Marco,
the overflow error is not a big problem, I mean that it seems to be "automatically" managed: I didn't noticed it until I tried to catch errors and the reception was ok, i got all the bytes I expected.
DMX is a serial communication at 250000 baud, I can't (and I don't need) to modify the baud rate.
What I need to do is to catch the framing error that I'm sure occurs because the DMX data packet starts with a BREAK that lasts at least 88 µs and during which the line is low (zero).
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