I have a requirement of changing the cursor from normal arrow to hourglass in my application. I am using the SetSystemCursor Win32 API to do so. But, it does not seem to be behaving correctly. Below is the sample code that I developed to demonstrate the problem -
Imports System.Runtime.InteropServices
Module Module1
Sub Main()
[code]....
I am using VB 2010. I have a process that gets file names into an array and then processes each individual file. To know the progress of the process as a whole I added a progress bar. I init the Max property with the number of elements in the array, set Value to 0 to clear the progress bar and then I start processing each file. Processing takes a minimum of about 5 to 7 seconds, so I should be able to see the progress.
The problem is that the progress bar does not correctly visually represent the advance of the overall process. For testing reasons I am using 4 files. When the first file is done, the progress bar is empty. When the second file is done the progress bar is filled 25%. When 3 files are done it is filled 50%. When all files are done it fills to 75% then immediately jumps to 100% filled.
The kicker is that when I uncomment the messagebox statement shown in the code example it works just fine! I added the DoEvents() then the .Refresh call, but there was no change in behavior. I left the .Refresh commented since I believe that it is redundant with the DoEvents call. I think it might be a timing issue where the progressbar does not attempt to update until after the .Refresh/DoEvents() statement, by which time is now processing the next file.
Code follows:
'Get the file specs into array.
'Set up the progress bar.
progressBar.Maximum = strArrayOfFiles.Length()
[code]....
I built the project into an EXE and ran it under Win 7 and Win XP. It works right under XP, but continues to show the above described behavior when it runs under Win 7.
I was scripting a very basic process manager, with a ListView component, and it was working fine for many days, up until now.Here is the code for getting processes:
Dim Process As New Process()
Dim Count As Integer = 0
ListView1.Items.Clear()[code].....
The line of code where I put "*WIN32 EXCEPTION LINE* keeps running into an error(Win32 Exception was unhandled; Access is denied). Here is the full error description:
System.ComponentModel.Win32Exception was unhandled
ErrorCode=-2147467259
Message=Access is denied[code]....
As I said before, this had been working for several days, up until now.
I�m using Outlook to automatically send an email to my mobile phone. To bypass the stupid "security" bug in outlook I use redemption.safemailitem.Now, this has worked for years, but for some reason I can�t change the adress to which outlook sends the mail. Instead of sending to the adress in the code, it sends to an old adress that�s not anywhere in the code (but it was, ages ago)
View 6 RepliesI made some changes to our log file since it was giving errors about being in use. Now it's chopping up the log file or not logging at all and its not usable.This is what the log looks like:
> vice(IndexInformation indexFileInfo,
> StringBuilder[] Keys) in
> D:WORKSOURCEVS2005DLLsDataLayerDataLayerDataHandlerDataHandler.vb:line
> 2646 at
[code]....
I am having the following problem, when the user wants to use the DateTimePicker (DTP), the date box shows in the middle of the screen. Then if the user wants to select a date he cant, instead the date box goes away and the DTP value remains unchanged. This is not always happening, sometimes it works fine and sometimes this happens.Please go to the link below for an image (you can see that the DTP control is on the left while the date box is to the right):[URL].. application is being run from a server to a local client on the user machine, I dont know if this has anything to do with it.
View 6 RepliesI have refactored the C# CodeProject version into a VB.NET version that works for me.[code]I am building a kiosk application, and in order to keep it aesthetically pleasing I decided to implement a watermarked textbox as the entry fields.I found this project on CodeProject, converted it over to VB.NET and put it into my application.It works, in the sense that it watermarks and clears them just fine, but when I go to enter text this happens:[code]
View 2 RepliesI have written a vb code for the Monte Hall Problem(in my case I have used the example of 3 cards - one of the card is red and 2 are black, you have to choose red to win) But I am not getting the desired results as expected.
Could someone point out my mistakes or advice me where I have gone wrong in my code.I have attached my vb code with this thread.
[Code]...
Ok for some reason I am having multiple problems with this code. The first issue is that one of the lines of code is seemingly ignored. Another issue is that some of the events are firing many times when they are only supposed to fire once. I have attached my code.
By the way, the string stored in AppSettings("WatchPath") in this case is C:Temp
Imports System.Configuration
Imports System.Diagnostics
Public Class Service1
[Code].....
I have created a button in a UserControl. I have added that button to a WindowsForm in another app and added a buttonclick event to the code. When running (debugging) the app and clicking on the button; nothing happens. It doesn't act like a button at all.
The code for the button click event in my test app is as follows:
Private Sub Element1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Element1.Click
MsgBox("The button has been clicked")
End Sub
I have created a button in a UserControl. I have added that button to a WindowsForm in another app and added a buttonclick event to the code. When running (debugging) the app and clicking on the button; nothing happens. It doesn't act like a button at all.
The code for the button click event in my test app is as follows:
Code:
Private Sub Element1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Element1.Click
MsgBox("The button has been clicked")
End Sub
Do you know which website that free download ebooks on API VB.net? I'm a second grad on IT programmer.
View 2 RepliesI am trying to create a small utility that tracks desktop usage in detail, to the level of individual text boxes etc.... in other applications. However, it is proving quite tricky. I thought I had it nailed using the Windows api. The below code is just a snipet of the code but essentially it provides me the handle of the control that the mouse is over. I thought from here, it would be easy to to the same thing but to provide the handle of the control that the cursor was actually clicked on, for example, if someone is filling in a text box in an application, they would not necessarily move the mouse to get to the text box, they may tab to it. Does anyone know if there is a way to get the handle of the control that is in use?
Private Sub Timer1_Tick(sender As Object, e As System.EventArgs) Handles Timer1.Tick
Dim ptx As Integer = Cursor.Position.X
Dim pty As Integer = Cursor.Position.Y
[code]....
Does anyone know of a good 3rd party reference for Win32 API for .Net where VB.Net is the target language Most API references target C as the language of choice. Frankly, I hate C and all C like languages.
View 11 RepliesAlright today im going to make a chat program in C++ and VB.net VB.net will be the server and C++ will be the chat room. Im doing this becuase some people dont have .net and the program fails so im trying this so then everyone can use it. How would i do this? Like C++ sending information to VB.net and printing it out on a textbox
View 2 RepliesWe have a .NET app that needs to examine a folder that may contain COM libraries (DLL and OCX.) When we do encounter a COM library one thing we need to accomplish is to extract the GUID from the COM DLL or OCX.Is there a straightforward way to do this with .NET without using 3rd party libraries?
View 3 RepliesI read in msdn that registrykey class is found in Microsoft.win32 namespace.But when I try to add a reference to my project, I couldn't find Microsoft.win32 in the list.
View 4 RepliesI have installed VB6 and Visual studio 2005. when i am opening the VB6 files getting this error.
Visual Studio Just in time debugger
An unhandled win32 exception occurred in VB6.EXE
Long story short, code that used to work on my 32 bit computer doesn't work on my 64 bit computer. Does 64 bit require something like changing Integers -> IntPtrs?
View 11 RepliesI have a Delphi program that communicates with a vb.net dll that I created. The vb.net dll communicates with a Fluke scope meter via an RS232 connection. I have created a program that communicates correctly via RS232, giving me the anticipated value. Though, when I package this up as a dll and access the dll from my Delphi program I always receive a value of "1", rather than the value I was expecting (most cases a value in and around 240).I know that my delphi program is definitely communicating correctly with the dll and that my dll is definitely communicating with the scope meter
Here is my vb.net code:
Public Interface IFlukeComm
Function GetReading(ByVal Command As String, ByVal PortNum As Integer) As String
[code].....
I am trying to extract icons to use them in a listview. I have use similar code in VB6 but in Dot Net I am getting an error, eventhough the icons are loaded. "An unhandled exception of type 'System.ExecutionEngineException' occurred in System.Windows.Forms.dll"
I am not sure what is the correct way making this work in windows forms. Please any help is greatly appreciated. here is the code I am using to load the smallicons imagelist of a listview.
Imports System.Windows.Forms
Imports System.Drawing
Module ExtractFileIcons
[code]....
A DLL file contains some images inside PNG resource type.
I can view the PNG images in softwares like Resource Hacker, Anolis Resourcer & Resource Tuner. Check this screenshot of Anolis Resourcer for more details:
how do I get the PNG image no. 5220 from the DLL file and put it inside a PictureBox? I don't think APIs like LoadImage or LoadBitmap will work.
I want to retrieve all the files on the local machine to take a look at their attributes.I tried it with io.directory as: [code]From their I need the logics to retrieve the list again and again to get all the directories on the machine, to check later on for their files. [code]The problem is, that I only got file information from my startup path of the application, but I want to retrieve all files on the local machine.
View 1 RepliesI have this window with hwnd = 132240. I am trying to use WIN32 API's SendMessage function to send a WM_SETEXT message to the window.Code that I have written
Const wm_settext As Long = &HC
'sendmessage(66824
Dim rc As Long
[code]....
How do I use DeviceIoControl Win32 API and the IOCTL in VB oder C#/C+/C++ to power down a USB port?
View 1 RepliesI'm running into is some of the namespaces aren't being recognized. After searching the internet it seems I am supposed to have more than just System.Management.Instrumentation available to Import/Reference.However, that is all I can access.I need System. Management. ConnectionOptions and a few others, but don't know how to get these.Do I need to install the WMI SDK, or maybe the WMI Win32 Classes?
View 2 RepliesI need to develop a voice recorder application using Win32 Waveform Audio API interface in C# or VB.NET ..
View 3 RepliesWin32 resoruces updating , modification is quite toughest task there are very few tutorials.I am aiming to start a committe group for providing proper documentation of resource updating deleting etc
View 1 RepliesI would like to mix C++ Win32 DLL with VB in the same solution such as: [URL] It's just that I would like to reference the DLL with VB. In the example above:
[Code]...
Is there a .net namespace or similar/simpler way to get text from windows and child classes (controls) other than using a Win32 API messages?I think there is a way to get the handle of the active window in .net without WinAPI. Anyone know what namespace/class does that?
View 1 Replies
