I am running out of function keys and it will be nice if I can double up on some of them with the Shift Alt or Ctrl keys.I am using
if e.keydown = keys.F3 then{it does what it is supposed to}end if I tried e.keydown = keys.F3 AND e.keydown = keys.Shift but it gets ignored. Am I seeking the impossible or am I just missing something?Can some one tell me what I am missing or point me to an example?
I'm listening for the KeyDown event in one of my forms (vb.NET, by the way). In this form, I've provided functionality, to search forwards and backwards. Searching forwards on a previously searched item is achieved by simply pressing F3. Searching backwards is achieved by pressing Shift or Ctrl + F3. I'm looking to use the Ctrl or Shift key (whichever is pressed) as a modifier and then I'd like to check e.KeyCode for F3. The problem is that as soon as I press Ctrl or Shift, an event fires for that key. I then can't do a check for F3, because e.KeyCode = Keys.ShiftKey or Keys.ControlKey respectively.
View 4 RepliesI need to detect shift + arrow key in blank form. But it's not working. I also tried overriding IsInputKey method but it only detects single key press (like arrow key) but when multiple key are pressed it simply doesn't work.
View 5 RepliesHow to hold shift and then click button a and b (while holding shift)?
View 7 RepliesIn my keydown event handler, when Keys.Numpad4 is pressed with Shift, I get the same keycode code as for Keys.Right. Is this by design? How can I distinguish between the two?
View 5 RepliesIs it possible to set focus on the keydown event so after the button control, sets the focus into the keydown? although says often control can have focus,.Putting a button and a keydown event on a form...
View 2 RepliesI'm getting this message in my 2010 debugger suddenly for some reason:The CLR has been unable to transition from COM context 0x4c4b68 to COM context 0x4c4cd8 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
It happens while I am looping through a datatable. In each iteration I do a SQL Select lookup and a a SQL Update if I don't find a matching record.
For Each drCurrentRow As DataRow In m_Dataset.Tables("Group").Rows
Dim boolFound As Boolean = False
CheckForRecordInTemp(boolFound, drCurrentRow.Item("ACTIVITY_GROUP"))
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Am getting this error when am running the code to open/close the CD try:"PInvokeStackImbalance was detected Message: A call to PInvoke function 'TabsTest!TabsTest.Form1::mciSendString' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature"
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CLR detected an invalid program
View 8 RepliesI am using the following function within a WndProc override:
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Edit and Possible Solution: Based on the answer at DisconnectedContext MDA when calling WMI functions in single-threaded application I think the solution here is to call GetPortName() outside of WndProc. I will test this tonight and post my result.
This is the message that I'm getting out of a program I'm writing.
InvalidApartmentStateChange was detected
Message: The current thread used to have an apartment state of MTA, but the application has CoUnitialized this thread and it is now STA. This may cause calls on RuntimeCallableWrappers representing some COM components to fail and may also cause COM component that are not multi-threaded to be accessed from multiple threads at the same time which can cause corruption or data loss.The current program structure is UI buttons that activate a BackGroundWorker object to do the processing and display progress in a progressBar.The only thing I seem to have added (as in I disable the code and it works fine) is code to print two reports.To sum up, I'm in the backgroundWorker thread, and I kick off an event "PrinterDoc1.Print()" which I've handled (there doesn't seem to be much flexibility on using an event for that), then later on in the backgroundWorker thread this error shows up pointing to the invocation of a delegate which updates a label on my form.
I am getting this right after I bind grid. I called the db multiple times (no more than 5.) and I bound those result to a datatable and it then throws this error. I was not getting this error yesterday when i was running this program. And there doesnt seem to be anything I have not done before.
View 1 RepliesI'm using an AutoDesk Inventor View API (dont think it matters for this question) placed on my form. I can call files and have them open without issue, only when I open assemblies (drawing files) I get this error:
"LoaderLock was : Attempting managed execution inside OS Loader Lock. Do not attempt to run managed code inside a DllMain or image initialization function since doing so can cause the application to hang."
I dont expect anyone to know much about the API, however I assume this is a common error.
Hi to all, i really need some help with a piece of code. Im developing an app, which receive midi TIMECODE (MTC) and shows it on a textbox. when i start the app, it runs ok, and shows the mtc on the textbox, but after a few seconds it crashes and shows an error:
"A callback was made on a garbage collected delegate of type 'MidiTesting!MidiTesting.MidiIn_Callback::Invoke'. This may cause application crashes, corruption and data loss. When passing delegates to unmanaged code, they must be kept alive by the managed application until it is guaranteed that they will never be called."
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I want to make an internet checker , but I don't know what's the problem with this PinvokeStackImbalance. Actually, the code was made for Visual Basic 2008, But I`m using Visual Basic 2010.
WebTest = CBool(InternetGetConnectedState(dwflags, 0&))
Where's the problem? Btw, it's a module.
im trying to grab the Text from Yahoo Messengers Window in Microsoft Visual Basic 2005 Express Edition. I get this error when trying to grab the Chat Windows Text. Edit... think that was my code to set win Text but still i dunno why that error happens.
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Then i downloaded C4F (Code 4 Fun) an application that's allow you to make Peer2Peer Applications using the PNRP.
So then i made a simple chat (Must say you do not need to fill in any code at all for this chat system) then i compile the source code to an *.exe file and everything seems fine at this stage.
But now the problem accours, when im am sending my chat application to my friends they got an alert about it's a virus im sending them. but when the file is on my own system it dosent say anything at all, and i have AVG Pro Edition & OutPost Firewall 2009 with lifetime license. and all my Anti Virus / Spyware Engine is up to date.
I have been writing on another forum on the internet but they just told me that my system was infected with a virus and that was the problem. s� ive completely deleted my whole system, and installed the Windows XP Professionel again.
But i i stil have the same problem? any one knows whats going on here. i cant post anycode for this cause you don't need any code for making a Chat application in C4F, Basicly it loads a C4F project in to Visual Basic Studio 2008 with no source at all.
Message: The CLR has been unable to transition from COM context 0x1b2008 to COM context 0x1b2178 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulatingcontinually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
View 3 RepliesNew one on me. RaceOnRCWCleanup was detected happens when I close my application. The complete error was:"RaceOnRCWCleanup was detected Message: An attempt has been made to free an RCW that is in use. The RCW is in use on the active thread or another thread. Attempting to free an in-use RCW can cause corruption or data loss."
I found a link for the error here[URL]...34(VS.80).aspx . That either went screaming over my head, or it is like listening to politicians, a lot of words that don't mean much.
My best guess is that I added a WMI query that runs periodically in a background thread, thinking that because it was a background thread I had nothing to worry about. I added some code to close the background thread before the application closes and so far,
[code]A call to PInvoke function 'WindowsApplication1!WindowsApplication1.FEUSB::FEUSB_ScanAndOpen' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature."
View 3 RepliesI am trying to load data using a backgroundworker using a code snippet that I found. I think that it would all work fine, except that I am getting an error that I am doing a cross thread operation. The task that I am trying to accomplish is loading data for a large dataset when a command (Run Operation) is called so that I can prepare the user that it may take a long time, and I can display a scrolling marque to show them that the program is not frozen. I am using a separate form to display the warning, an OK button, and a scrolling marque.[code]
View 2 Repliestrying to detect the process, if it is not running, then only run the process, but it still runs the process eventhough the process is still running :(
For Each Proc As Process In Process.GetProcesses()
Dim strProc As String = Proc.ProcessName & ".exe"
If Not strProc = "MemberSyncFBtoSQL.exe" Then
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I am using a TwainPro4.dll for scanning purposes in my VB.net application framework v3.5.When i run my application i get the below exception,
LoaderLock was detected
Message: DLL 'C:WINDOWSassemblyGACPegasusImaging.WinForms.TwainPro44.0.22.0__80d669b8b606a2daPegasusImagi
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So, I am just trying to get the snake to move after it collides with the picture box. Right now, the snake is moved by using the arrow keys. However, once it collides with "the food", it won't move.
Imports System
Imports System.Drawing
Imports System.Drawing.Graphics
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Im trying to make a simple uploading program but when i run the program it is being detected as a virus and is being deleted. I have tried using 2 different ways of doing the ftp uploading but both are being deleted. the code im using is:
My.Computer.Network.UploadFile("file location", "upload location", "username", "password")
and
Dim request As System.Net.FtpWebRequest = DirectCast(System.Net.FtpWebRequest.Create("upload
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I don't know how to get shift modifier key as when I pressed shift and another key, it show message box "Modifier shift key"
View 1 RepliesCan VB.NET Form keyDown event determine whether left or right shift (alt, control) key was pressed? I always receive the same keycode (16) for both left and shift key!
View 3 RepliesI've developed a simple program and in it I 'copy-pasted' some code which makes a copy of the program executable in a particular path (docs folder) and sets registry to start the executable in windows start-up only.. Everything is working absolutely fine in my PC. But when I sent the exe to my friend's PC. Then the antivirus in her PC detected it as a trojan!
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I would like to detect the insertion, and completion of installation of a USB cable in VB2008 as two separate events. The driver gets installed prior to insertion of the cable.
View 5 RepliesI am working on the msi installer built by VS(Setup and Deployment Project). I 've got everything else working like charm except the prerequisites of the project.
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