I am a novice in programming and wrote several simple Windows Forms applications. I need to play mp3 file in Windows 7 x64 application.
Could you, please, explain in simple words, how to call MediaElement.Play() method from Windows Forms?
I'm using Microsoft Visual Studio 2010 Express: the C++ and VB versions.
There is some VB code that forms the body of a program, and all the GUI.There is also some C++ code that does some fast processing (lots of loops).
I am trying to call the C++ code, compiled as a dll, using:
Private Declare Sub CalcGraph Lib "Model.dll" ()
And at the moment keep getting the error: Unhandled exception has occurred in your application. Unable to find an entry point named 'CalcGraph' in DLL 'Model.dll'I'm fairly new to programming, so please be patient with me That said, I'm prepared to do the leg-work, and have already spent quite a while reading around on this and other sites. Nothing seems to match quite well enough to help me understand what's going wrong.
In my VS2010 VB project I have a lot of external references to DLLs, to the point that organization has become a major headache and I'm wondering if I am going about it the wrong way. My assembly references include common redistributables (SQL Server Compact 3.5 SP1, ReportViewer 2010 SP1, DataVisualization, as well as some useful 3rd party dlls from CodeProject and CodePlex.
Currently, I am copying each DLL into a 1st level folder (/dll_lib) under my named project folder (under the solution folder), and adding the reference from that path. However, I see that Visual Studio copies the DLLs to various other locations (/bin/debug or /bin/release) in my project when I build the project or solution, and some of the 3rd party DLLs come with instructions to copy them manually to /bin.
What is the "best practice" for where to put the DLLs? Can I just put all of them under /bin and let the build event copy to /bin/debug or /bin/release as required? Should I try to force a single reference path for the dlls in the project output?
I have a basic three form application. It doesn't seem to close after navigating through forms. If I were to open the application, and the main form is displayed. If I press the X button, the application closes fine(Goes from processes) If I were to open the application, and then navigate from the main form to another form using me.hide & form1.show, and press the red X on Form1, the application again, closes fine.
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We are installing our application on windows 7. The application utlizes a Acces database. The application locates the database by looking in the registry under at HKEY_LOCAL_MACHINE / SOFTWARE / WOW6432NODE / COMPANY NAME / SOFTWARE NAME /STARTUP. When i install the application on windows 7 it places the a database where installshield directs it to and writes the path to the registry. However, somehow local copies of the database are showing up under the user profiles. (Example: c:/users/profilename/AppData/Local/VirtualStore/Program FIles (X86)/Company/SoftwareName/Data). We recently changed it to store the information in c:/ProgramData/Company/software however the same issue occurs and its creating local copies of the database and when the application runs it points to the local copy of the database. What we need is for all users to be pointed to and use the same database in ProgramData, is there something we are missing to accomplish this?
View 10 RepliesIn a label box, I want to list a couple of websites, email address along with some text. How do I go about it?
Potential uses- As a Help > About dialog box where websites, email of the author can be listed.
To make things as easy as possible for the user, and encourage visiting of the mentioned websites.
Simple text will be ignored, while standard blue color, underlined text with hand mouse-cursor will need no thinking on user's part.
I have a windows forms application written in VB.NET which scrapes information from serveral web pages (who doesn't right)? Anyway, I am having problem with one particular site where partway through the page navigation my application hangs. When I press pause (or break) in the debugger, it stops on a call to System.Windows.Forms.Application.DoEvents.
Resuming execution shows that it really is stuck on this line (it does not reach the next line of code). It also hangs about the same point each time I run it (at least its consistent). Since System.Windows.Forms.Application.DoEvents yields to other threads on the same processor and then resumes execution of the current thread, I think the problem is that some other thread is not behaving well (not returning from some event handling code). I thought Windows 7 was pre-emptive, which makes me
doubt that theory but I really don't know.
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The program scrapes somewhere between 12 and 14 pages before it gets stuck on the call to DoEvents. Does anyone have a clue why this would happen? Why would any call to DoEvents hang?
How can I find the OS using Visual Basic 2010? It does not seems to recognize any of the old commands like GetVersionEx etc.
I am looking to find out the Windows Version, Build, 32 or 64 bit, RAM, Processor and Manufacturer.
My students did a tutorial in HTML Help Workshop to add Help files to a VB 2008 Windows application. They zipped the files and uploaded them to our class web site.
I downloaded them at home, unzipped, and tried to check, but every one shows Table of Contents or Index and cannot find the .htm documents for the topic. The same thing happened in my office. However, these projects work correctly in our classroom
lab and do display the .htm files.
I really wanted aqua skin (Mac OS X) for my forms at Visual Basic 2010.I found a site called SkinSoft which offers an installation for a componentfor them that skins over the form to make it Mac OS Xish.Now, they say that - Visual Basic/ C# Express users will have to manuallyadd the item into their toolboxes - "Choose items", and from the list choosethe AquaSkin component or whatever name it is, but I couldn't find it in mine.
View 2 RepliesI am making a server - multiple client windows form application using Visual Basic Express 2005.
I was wondering if there was a way that I could debug multiple instances of the client at the same time?Ashray Lavsi If my post answers your Question, don't forget to "Mark it as Answer"
I have a Visual Basic 2008 Express Edition application that operates as a front end for iSeries V6r1. The application was developed on a windows 7 machine. Users load the application from a shared folder on a server. Currently, there are 2 Vista, 3 windows 7 and 4 XP users. All had no problem in loading application, all users except 3 of 4 XP users can run the application with no problems. However, 3 of the XP users receive the following error message when they perform any action that tries to connect to the iSeries:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
All 4 XP users are on same service pack
I have an application that has a treeview in the MDI parent form, there is a button1 that adds a child node to the treeview and a mdichild form for that specific treeview child node. i would like to know if it is possible to save the trevview and the MDi child forms to a single txt file or csv file no matter how many mdi children and treeview child nodes are poduced.
View 11 RepliesAfter starting debug te program hangup. Moost of te time if DataGridViewLijsten_RowHeaderMouseClick is called. Using pause butten the program is almoost in the random routine.
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Iam developing a Windows application using Visual Basic 2008 with a SQL Server database. Throughout the program I give the user as many options as possible and have no problem with either the database or the windows forms. The program does not initially require a Login and I want toprovide the User with the opportunity to add a Login to the system. The default Login form is perfectly satisfactory.
The problem is that I can't figure out how to program the change sothat the Login from isopens the program rather then th form designated as the StartUp form. this forum I am able to prgrammatically change the form but I can't figure out how to make the requirement a permanent factor. I tried using a Constant, but if the User wants to change, you can't change the constant. Its an apparantly simple yes/no situation but if I set a varable to yes and then change it to no the next time the program runs, the change will be lost.
As the title says, I have a program written in VB.net 2010. When I use the publish feature it creates a manifest and setup file that install the program nicely on another PC, but I think the security settings are somehow wrong because it sits there for ninety seconds upon launch. The program works fine on the computer that built it. There is no CPU usage while it is sitting around.
View 1 Replies.NET developing and have a simple question, i've been stuck on this for a while and searched many forums first with no solution so i'm posting myself. In VB for excel i've used Screenupdating=false to disable the screen updating however now i'm creating a visual studio 2010 windows forms application and its not showing up as a property. Here's the code i've tried.
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Is there a way to call a procedure in Visual Basic (.net) with a variable name? For example, the variable strColour can be one of 10 pre-defined values, green blue black white red pink orange yellow indigo purple. How to handle each one is in it's own Sub Routine, colgreen, colblue, colblack and so on.
I can use a bunch of if..then..else and select case, but what I'd like to have is something like VBA Excel's Run "col" & strColour
At present I have wrote an application (in-house CRM, vb .net 2010) which allows me to send emails under the selected customer & I categorised these emails.As these are categorised I can return data to display email history in my program by using search criteria:
Dim oMail As Outlook.MAPIFolder = oNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderSentMail)
Dim sSearch As String
sSearch = "[Categories] = '" + "[" + tAccount.Text.Trim + "]" + "(" + tShipTo.Text.Trim + ")'"
Dim oItems As Outlook.Items = oMail.Items.Restrict(sSearch)
However the limitation to the above is it only looks at sent items & no other folder.My ideal solution would be to display all email correspondence for a certain contact.
i've been stuck on this for a while and searched many forums first with no solution so i'm posting myself. In VB for excel i've used Screenupdating= false to disable the screen updating however now i'm creating a visual studio 2010 windows forms application and its not showing up as a property. [code] And i get the error 'screenupdating is not a member of 'system.windows.forms.application'.
View 2 RepliesHOW i insert image in microsoft access and how to call in visual basic
View 1 RepliesWorking on a project trying to use mysql and Visual Studio C++ 2010. I have an established connection to the database on a server using a connection string. My issue is I am not sure how to get the retrieved data displayed in dataGridView. Below is where I have my code for the button named Search. Right now all I am trying to do is get already inserted information out and displayed. Not sure if I am utilizing the dataGridView correctly or if there is another way. When I select bind to database I do not show any data sources even though in my server explorer window I show that I am connected. I have googled my eyes out and still havent found any information relating to a non console application. Here is some code that worked and returned a value of 1 to a textbox just stating that it had no errors in the execution. [code]
View 1 RepliesI have Visual Studio 2008 Professional and I'm trying to make it so I can click a button to send the application to the System Tray and then click the icon in the System Tray to make the application come back.
Can anyone provide me a method or sample code to do this?
I am working to make a function that will update the back color of a text box based on multiple variables values. I can write the code to do the calculation, but I am not sure how to make the function realize which text box to update (as I will have about 30 different boxes). Below is the code that I have for each box so far, but I will have quite a few more, and would rather use a function to reduce the amount of code, and also make it cleaner as well.
If sngPreviousPrimaryPropertyTotal >= sngPrimaryPropertyTotalCost Then
txtPreviousPrimaryPropertyTotal.BackColor = ColorProgramLightGreen
Else
txtPreviousPrimaryPropertyTotal.BackColor = ColorProgramLightRed
End If
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Or is there a way that I can tell the function that it's updating the text box that call the function in the first place? Say if txtBox1 has updated text and calls the function, then the function 'knows' to update txtBox1, but will update txtBox2 when it's called by txtBox2.
In my VB.net code i have:
cmd.CommandText = "SELECT * FROM [strfg].[dbo].[Myfunc] (@MyParam)"
Dim myparam As New SqlParameter("@MyParam", a)
cmd.Parameters.Add(myparam)
The function (runnig on SQL server) returns a table with four columns, one row.How do I call this function from Visual Basic? cmd.ExecuteScalar() is obviously not correct. In c++ I use a recordset. What is the equivalent in vb? Does anyone have a short example?
I am fairly new to programming and I am trying to create a MS Word add-in to add an xml file into the WordprocessingML package of docx files.I am currently having trouble with Microsoft.Office.Interop.Word.Application.ActiveDocument", used:Dim currentDoc As Document = Microsoft.Office.Interop.Word.Application.ActiveDocumentbut I keep getting the error: "Reference to a non-shared member requires an object reference" there.
View 2 RepliesTrying to get it to behave like C#, where there is a Program class with a static Main method.However, in the project properties, I cannot set Program.vb to be the startup object, only the forms (it is a forms application).
View 2 RepliesI have a windows forms app (32 bit) written in VB2010 which occassionally hangs in windows when minimised to the task bar You click on the icon on the taskbar and it will not come back up on the screen
No other modal forms are open in the application when the hang occurs Other programs respond OK
I ran Process Explorer against when it was Hung but do not know how to interpret the stack page, or even if it is helpful STack page with my application selected and Threads tab selected with CSwitch Delta column sorted descending. Then double clicking the top entry (my application .exe)
Note: This is running on an x64 machine, but also hangs on x32 machines
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What I have is on my form there are several text boxes. These text boxes are for user input and attached to each text box is a Private Sub txtBox1_KeyPress function. In that function I have some validation code to check that the user is inputing only what I want them to. And if it doesnt it will pop up a message box telling them so, then it is supposed to clear the text box so the user can try again. But no matter what I try, the text box does not clear it still keeps the last character typed (the invalid one).
Here is the code for one of the text boxes.
Private Sub txtLanIp_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtLanIp.KeyPress
Dim strEmpty As String = ""
If Char.IsDigit(e.KeyChar) = True Or Char.IsPunctuation(e.KeyChar) = True Or Char.IsControl(e.KeyChar) = True Then
'do nothing
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The commented methods at the bottom are some of the other things ive tried to make this work. The txtLanIp.text.clear() is what ive tried from the beginning. I have also tried setting the text to "", I even created an empty string and set the .Text value to it but no matter what it wont remove that character. I have also tried various trim(), len(), Select() functions, most either give me an 'index out of range error', a 'length cannot be less than zero' error or a general ExceptionOutOfBounds error. I am just tearing my hair out as to why the simple way doesnt work, there is no logical reason why and it gives no error it just doesn't clear the box.
I have also tried moving the validation to a _LostFocus but e.KeyChar isnt a valid method or property for that declaration, which doesn't surprise me but I wanted to try everything.I dont see how it would matter in this case but I am running Windows XP Pro SP3, though I also see the same behavior in Windows 7 64 bit ultimate sp1 and windows 7 64 bit pro.
If I create a windows app which I link to an MS Access databse file that already exists..will I need to have MS Office installed on every computer at which I want to use the app? If not then how do I go about making a standalone windows app that will store information in a database of some form or another ?
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