I've been trying to find a Windows API function I can use to generate a virtual file handle in Windows. I'm working with VPC/xVM and I want to create a virtual machine that actually points to my physical hard drive - the methods provided with VPC and xVM for this really suck (I've never been able to get it to work with either virtualization product).
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I have seen similar questions which attempt to solve this issue, but none seem to work for me so far.Basically, for my first VB project, I am creating a virtual keyboard where a sound is played from the resources on KeyDown. So far, the program seems to work except for the fact that each key needs to be clicked by the mouse before the sound is played by pressing each key (hence put the object in focus), where I need the key to play the sound without clicking the keyboard key (put the object in focus on KeyDown).Below is an example of my code:
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I'm trying to write an application that will allow a non-administrator user to create virtual directories in IIS6. I've tried numerous different ways of impersonating a administrative account but nothing seems to work to create the virtual directory.
Here's some of what I've tried:
dim sDirPath as string = "IIS://remotehost/W3svc/1/root"
Dim de As DirectoryEntry = New DirectoryEntry()
de.Path = sDirPath
de.AuthenticationType = AuthenticationTypes.Secure
de.Username = tbxUsername.Text
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what is the correct way to impersonate another user in winforms application that will allow me to create the virtual directory without the user that's running the application being an administrator on the web server? I know this can be done, IIS manager allows you to use "connect as" checkbox to do it.
I'm creating that sets up project directories based on a template and also allows users to select folders from the template to add to a selected path (their project dir). I've got everything figured out as to creating the directory initially except for 1 thing that ties into another (stick with me here). I'd like to create the directories based on a text file or some sort of config file. Essentially, I would have a text file that contains lines like:
oot
ootsub1
ootsub2
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etc. Then when I create the directories, I can create them based on these lines. I think I can figure that part out myself. Where I'm stuck is on comparing the selected dir to the template dir. Right now I have a treeview control with checkboxes that is populated based on a path that the user selects from the folderbrowserdialog. What I need to do is compare the selected directory with the directories in the text file and if the directories exist (match) then they are checked. If they don't exist in the selected directory then they are unchecked.
If a user wants to add a directory from the template, they check the box for the dir they want and uncheck the boxes for the ones they dont. Then hit apply and the app will either create or delete the checked/unchecked dirs. What's the best way to handle the template dir? Should I do the text file thing or should I simply have the directory structure setup somewhere where the app can copy the dirs from the template to the selected directory? Or should I use an ini file? I want to make the app flexible so that down the road, if they change the template layout, or where the template lives, the app can be told that. So I need to add a way for the users for example to choose the template directory (but not everytime!) or specify the path that the template dir txt file lives.
I want to create a .txt and then run a batch file which runs a .pyc which uses this file as a parameter. When I do this, I get a message that says the python program was unable to access the file. However, if I break after creating the .txt, then manually open, save, and close it (note: open close only doesn't work), and then continue running my code, it works fine. I think that my program still has control of the text file when the python program tries to access it, however I don't know how to release control.
'array input is system.arraylist of all words that I want to have in the grammar
Dim fso As FileSystemObject
fso = CType(CreateObject("Scripting.FileSystemObject"), FileSystemObject)
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There are three forms on this application and they are a MDI Frame(frmMain) and two child forms (frmSearchEmp, frmEmpDetail).
What I am trying to do is opening a "frmEmpDetail" by executing "CallEmpDetail()" on "frmSearchEmp".[code]....
In vb.net and made a proj. in vb2005. but when i try to load a particular form(opens up in a mdi container like all others in the project) , an error-error creating windows handle pops up, the line is frmadmn(the form).show
What shall i do? i read a lil on the net about too many handles, user objects etc. but the stats of my proj. at the time of error are-handles-350,threads-17,user objects-235 gdi objects - 159. have these anything to do with the prob.. then what should i do..? i read about the dispose command also about how to use it ? what to dispose...?
I get this error as below when I open my "frmAddPrivate" more than 5 times. How I can overcome it?
View 5 RepliesI've a little program that has got tabControl with 2 tabs - "results" and "log". My idea was that when an error occurs the tab will switch automatically on tbLog to show what the problem was. Most arguably the problem is in threading. This is the code that..I use:
Dim thread As New Thread(AddressOf ExecuteQuery)
thread.Start()
ExecuteQuery executes the query and I'm making an error deliberately to see if I'll be automatically switched to the log tab which is in Try-EndTry procedure:
tbGrid.SelectedTab = tbGrid.TabPages(1)
The program indeed switches to tabLog (which is number 1) but I don't see any controls on it (txtLog), then when I'm trying to switch tabs a couple of times I get "Error creating window handle in a thread". I read other forum threads about it where people as how many controls do they have in their programs but my program does not exceed 70 controls on a form.
I am using a Thread object to perform a function. This function performs a task and displays its progress in the gridview (like adding rows changing text etc )
The reason I am using a thread for this function is that there is a cancel button on the form. While the task is in progress, user can click on cancel to abort it.
Private Sub BtnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnStart.Click m_Thread = New System.Threading.Thread(AddressOf myfunction) m_Thread.Start() End Sub
The function works fine and thread is completed. But calling any method of datagridview after thread is completed ( outside the worker thread ) generates an error- "Error creating window handle".
That's probably because i am not using the invoke method of datagridview for calling its methods or readingwriting properties Do i have to create separate delegates for all the methods properties used in the function ( worker thread)
I know this idea of - if message boxes are used to display error messages inside a .dll and when the .dll is installed in a different computer (possibly a server machine), errors occurring inside that .dll will be shown in the server and not to the user. Since practically there will not be a person near the server to click 'OK' to the error message every time it occurs it will stuck the programs using the .dll.
So how to write exception handling to a .dll project?
I'm working on an asp.net project which has a form with a file attachment capability. Since I'm uploading the form on a server, I can't use a physical path. How do I use the asp:FileUpload with a virtual path?
View 2 RepliesI'm trying to make a program that can mount a file associated with the program as a virtual drive such as PGP does. Encryption isn't necessary to the program, but if it is needed to mount the file as a virtual drive then so be it.
View 1 RepliesI'm in the process of converting a VB6.0 application to VB.Net (2008 Express). I have a MDI parent form, I'll call mdiBackground, and 4 MDI child forms, frmStatus, frmShow, frmQwerty, and frmSentence.The layout is as follows:mdibackground - has the menus at top and is a container for the child forms.frmSentence - appears at the top frmShow & frmQwerty - appear at the left and when one is closed the other one is in the same position.frmStatus - appears at the right, it has buttons which control when frmShow and frmQwerty are to appear I have a couple of regular forms that act as dialog forms. The Me.Close() works fine on these.
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I am trying to display an image from a Virtual Directory that is within my website. If I use the follwoing code the image is displayed on the on the Page:
Dim sourcefile As String = Server.MapPath("~/Common/Images/Flag.jpg")
Response.WriteFile(sourcefile)
Response.ContentType = "image/jpg"
But if I try displaying the image in an Image control useing the following code the image isn't displayed:
Dim sourcefile As String = Server.MapPath("~/Common/Images/Flag.jpg")
Image1.ImageUrl = sourcefile
Here is the HTML/ASP code:
<div id="contentQE">
<fieldset>
<span class="graytitle">The Flag Image
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the problem i met is that i have iis 7 running on my pc.in the root file, wwwroot, i have a website folder, namely [apex] which is a virtual directory. in the folder is a bin folder containing a compiled class with namespace.then in an aspx file, i tried to import the namespace and use the class inside the namespace.
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the namespace and classname has been checked well, no mistake. but at compiling stage, i got "type is not defined " message. ok,then, in iis 7 control panel, i convert the whole website folder from "virtual directory" to "application" type. the problem goes away!
I'm trying to create a virtual piano using pictureboxes to represent keys that play .wav file versions of notes. I've gotten this to work fine; however, I'm having trouble with two features I want to implement.The first feature is to be able to save what I play in a text file. I thought I could use this code but I'm getting an error. [code] The second feature is to play random keys using the random class. Is there any way I could store the pictureboxes in an array and then use the random class?
View 3 RepliesWe have a VB 2008 Windows application that is deployed on several hundred computers. For some strange reason only 2 computers out of the hundreds are experiencing the "Error creating Window handle" error. It is happening more consistantly on one machine than the other. Any idea what might be causing annoying error on such a limited basis? (It's a Windows XP machine that it is happening on. That's all the info I know regarding the machine currently.)
View 2 Repliesunhandled exception has occurred in your application. if you click continue, the application will ignorethis error and attempt continue. If you click quit, the application will close immediately"error creating window handle"What is this and how do I get rid of it?
View 4 Replieshere i am reading files from one root folder and after reading that we are moving that particular file Success folder and taking a copy of that in to back up folder normal
while reading file i will check file naming convention by targeting backup folder if suppose it was exists in backup folder then i m moving the file to duplicate folder
my problem if suppose again same file came to process this file already existed in duplicate folder how do send the file in to duplicate folder, unfornately i dint have any property as file rename
If File.Exists(Swift_Backup + "" + Path.GetFileName(CBFile)) Then
' File.Move(CBFile, Swift_Duplicate + "\" + Path.GetFileName(CBFile)) 'DUPLICATE FOLDER'
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I am trying to read and display a file using MapPath as follows :
Response.ContentType = "Application/pdf"
Dim FilePath As String = MapPath("../Document/123.pdf")
Response.WriteFile(FilePath)
Response.End()
This procedure will work fine and display in the browser. However, if I save the file to C:Document123.pdf, how can I access this file using relative path in MapPath function. Is there an option to access the file which is saved out of IIS server? I am using vb.net 2003.
I want to use the GetFileInformationByHandle function under kernel32.dll in order to get the NTFS unique file identifier.The function declaration is like this [code]...
how do I get the file handle (hFile As IntPtr) for a given filename in visual basic ?
What i mean here is how can i save usercontrols that have panels that contains labels using filesavedialogbox and get it back by openfiledialogbox? i want it to be save as AMS extension. i try the code below to open it, but it's because it doesn't load anything.[code]...
View 3 RepliesI have been working on this for a long while now, I have added a Windows media player that I hide in the Background of my application window(form) . and lets say its named "Player"Player. "WHAT" = gets me the Original length of the Audio file being played ?I tried something .something. duration ... but that gets where the player is actually is . that's for the first request.
View 3 RepliesHow can we see if a file is open somewhere else .
It can be in windows or in other software
I am talking about vb.net programming functions and not softwares like process explorer
I'm trying to get a specific error message posted when a user tries to upload a file that exceeds the maxrequestlength of 10MB for my asp:fileupload object. However, adding the onError attribute to my fileupload object, the user does not get the error I want displayed; the page just crashes. Setting customerrors mode to on and setting up a redirect page doesn't work either; the page still crashes. How am I supposed to get the page to display a specific error without crashing?
View 1 RepliesDo you mean, "opens a file" or "is opened with a file"?
View 1 Repliesif I wanted the button onclick event in a different class how would I declare it?
when I refer back to the form it says I need to declare with events..
Private Sub btnAddToLaneFilter_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Dispatch.btnAddToLaneFilter.Click
If Me.txtCriteria.Text = "" Then
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I'm trying to implement my own downloader. I have the download Form and I had a way to show it but, It's inefficent because, It just checked for ending extensions!I just want to cancel the download and show my downloader with the URL.[code]...
View 3 RepliesHow can I set a file extension to open with my application?
Also how would I handle the file that it opens with?