Scanning From Twain Driver?

Jan 28, 2011

So - we are FED UP with our medical records packaging (document imaging) system and want to create a simple filing interface for our scanners to use in VB. Part of this deal is getting VB to interact with a TWAIN Driver.

There is some code out there for ASP.NET and C# - does anyone know of a VB.Net based code I could look at?

I have spent part of my day trying to recreate the ASP into VB but the calls are just different enough to get interesting.


Scanning With TWAIN - Hide The UI

Feb 18, 2010

I am making an application to scan with TWAIN. I can get to state 4 OK, and scan with the UI. But I need to hide the UI. When I do this the scanner does nothing. I believe it needs some capabilities set (like height and width). So I try to get the physical height and width so I can set them. Herein lies the problem. I get 18874402 back for the physical height and width. (neither can I get the units). I get RC=SUCCESS. I don't think it could be a signed/unsigned issue because what boundary is at 18 million +/- with whatever units? I tried some other code I found but that returns 0. I can't figure out what I am doing wrong. Here's the code:


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Built-in TWAIN Scanning Library In .Net 4 To Use It In .NET?

Jun 1, 2012

I would like to know if there is a built-in TWAIN Scanning library in .Net 4 to use it in VB.NET.

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Perform Twain Scanning Using The Twain_32.dll?

May 2, 2012

I am trying to perform Twain scanning using the twain_32.dll, but no luck. Whatever solutions I have got call the dll GUI.

I want to perform scanning by passing custom settings to the scanner for every scan. For eg. In duplex I want to scan the Front side in color & Back side in Grayscale. OR Scan every Alternate page as Color and B/W

The combination can be anything. I've tried & and succeeded using WIA but it limited me to a certain extent. how to proceed using TWAIN and without displaying the GUI. I am open to options where a communication to Twain Connection Manager is established & commands are passed.

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Implement Twain OCX In Project For Scanning Or Loading Pictures?

Jan 20, 2011

How to implement Twain OCX in VB.NET project for scanning or loading pictures?

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Cannot Set Capabilities Of Scanner Through Twain Driver

Sep 9, 2011

I have been working with TWAIN driver for few days. I have learnt how to connect to the scanner or get the working scanners connected to the machine. I am having a problem now, eventhough i get connected to the scanner, I am not able to set the capabilities from my application. The scanner scans using the capabilities that are set on it but not from my application. I have looked at the sample code given with twain pro but even that doesnt set the capabilities of the scanner. For example if the scanner is set to 300 dpi and I set 200dpi from my application, the scanner scans with 300 dpi. It gives me an error saying that the value given is out of range.

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Driver Detection - Tell User That It Is Safe To Close Program Once Driver Is Install

Jun 1, 2011

Trying to figure out if there is anyway built into windows 7/Vista/XP and/or Dpinst to verify that a driver is installed? I created a program that uses DPinst to install a driver and now I need to figure out how to tell the user that it is safe to close the program once the driver is install as the driver takes longer on some machines to install. Would anyone know how to get this to work?

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How To Use TWAIN For Scanners

May 20, 2011

So I got a working code for my scanner HP. it works perfectly


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Twain Scanner Application?

Jul 12, 2009

anyone tried using twain in scanner.I wanted to store in my database

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Loader Lock Detected Twain?

May 29, 2009

I am using a TwainPro4.dll for scanning purposes in my 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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Write A Program That Will Capture A Twain Scan?

May 17, 2011

I need to write a program that will capture a twain scan, then let the user input a file name and append a date and time stamp to the file. Afterwards, it should upload the file to a ftp share on our network. As a bonus, I would like it to log the transaction to a SQL server so we can verify the file was uploaded. The catch is, I have almost no programming experience. I have written a small program here and there, but never something that I had to call an outside source for besides SQL. We do have an in-house VB programmer, but he is to busy to do something like this. I wanted to give it a try myself before hiring someone else to do it since it sounds like such a simple program. I know how to layout the basic forms and I can probably figure out how to log the transaction, but I am looking for examples on twain scans and saving to ftp.

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How To Use Scanner For Scanning

Oct 29, 2009

I've installed visual studio the visual basic in that package known as My 2nd question: how can i use scanner for scanning using i have to use WIA? or i can use the default program for scanning?

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WIA Scanning With ADF Scanners?

Feb 15, 2012

I have been messing around with the scanning packages(WIA and TWAIN) and have gotten WIA to work, but not as intended. At first I used the common dialog to show a Image Aquisition Wizard, but that did not return desired results. Next was twain, but st managed to find was the same C# program over and over and over again, "TwainGUI". A program written by NETMaster on codeproject.What I would like to do is scan from the ADF and save immediately to the users working directory. The problem is I can't get WIA to keep scanning until the ADF is empty.

Psudo Code:
"Set scan settings"


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Possibility Of Scanning Document

Oct 23, 2008

I am ask about the possibility of scanning document (by scanner) from within vb.Net with vb6 I used Kodak image controls(imgscan, imgedit) but with it seems that they are not working properly.

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Scanning An Image From Scanner?

Mar 4, 2009

How I can use scanner to scan an image and put it in PictureBox using VB.NET

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Scanning The Computers In Network?

May 18, 2012

how to program an application that scans the computer in the network in

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Scanning Through All Instances Of An Object?

Nov 6, 2009

Is it possible to look for all current instances of a specified object without specifically IDing each instance as it's created?

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VS 2008 Scanning For A Thumbdrive

Nov 9, 2009

So I got a request to update specific information on a thumb drive from my program. The idea is that the user does not have to select the drive. If you plug it in and select and option on the program, it will find the drive automatically and update some files for my specific purpose. Is there a way to automatically find a drive in a program?

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Connect A Scanning Device To A Computer Using .net?

Jan 29, 2011

How can i connect a scanning device to a computer using .net? Code 128.

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How To Invoke Finger Print Scanning

Dec 20, 2009

I was just wondering if there is anyway to invoke finger print scanning in a .NET application? (Eg. Windows 7/Vista Login screens - assuming they have the hardware of course).

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Like Command Scanning With Special Characters?

Dec 7, 2010

I'm using the LIKE command as in:

If str Like

Unfortunately, this expression is true for the space character.  I don't understand why.  I'm trying to determine if str contains any special characters other than the ones indicated by s. If it does, I plan to process the string further.ebassador "Find it, fix it, move on.

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Scanning From .NET Scanner's GUI Opens And Then Closes

Mar 31, 2012

I developed a winform .NET 4 application that has the ability to asyncronous save image from scanner using Bytescout Scan. Anyway I noticed that in some cases (with some scanners) the scanner's GUI opens and then closes immediately after load without performing any scan. Since no error message is raised either from my code and from scanner software itself; is there some settings/tweak somewhere I should pay attention?

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Scanning Remote Directory For Files?

Apr 19, 2011

I'm not really sure where to begin for this.  I'd like to scan a specified server directory for all files that it contains in the directory.  (I will then compare the sizes to files already existing on the user's machine, but that I've got covered.)

If there's any way I could get around using FTP, I'd be very grateful, as this won't be entirely secure.  

 I did some exploring of the WebClient and WebRequest classes, but failed to conceive of a way to do this.

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Textbox New Line After Scanning Barcode

Jun 12, 2011

I have a multiline text box which is used to enter barcode numbers into. I have a barcode scanner and all the barcodes will end in L2, L3 or L4. Once a barcode is scanned in I need VB to detect either L2, L3 or L4 then go to a new line and repeat. Where I can start to accomplish this?

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VS 2008 Scanning Of All Pixels Of An Image

Dec 16, 2009

I come straight to the point without going too far. I need to scan all the pixels of a generic image and for each pixel derive the RGB components. I started with the following function that performs its task very good and returns 3 array (R, G, B) with the different values, but unfortunately is too slow.


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VS 2008 Scanning Through A List & Dumping?

Nov 14, 2010

Alright well, I'm sort of new to VB.NET.I want to create a scanner that scans websites from lets say google or bing.It then dumps those websites into a list/textbox. It then scans each website for a directory, and if the site says something like "test page", then it dumps THOSE into another list/textbox.

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C# - Does There Exist Any NON-GPL / AGPL Virus Scanning Library

Feb 18, 2011

Is there any C#/.NET code (or anything that is easily convertible to .NET, such as Java/Python) for virus scanning that is not under the GPL/AGPL ? I found a C# wrapper for ClamAV, but ClamAV is GPL... Something LGPL would already suffice, and as a matter of fact, would be something I prefer. Preferably something in fully managed code, but DllImport is also welcome. COM interop is a no-go, I need it cross-platform (=Windows & Linux).

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Find Virus Scanning/detection Algorithms?

Feb 2, 2010

Where I can find virus scanning/detection algorithms?

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Test Barcode Scanning While Developing A Application In C#?

Jul 14, 2011

I am developing an application which will be used to scan the barcode from a particular document, as i am just developing who i will get know that barcode scanning is working i dont have device at the moment

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VS 2005 DataGrid RowCount - Scanning Through All Records

Nov 17, 2009

I have the following records in DataGrid .see in Pic. On button click, I am scanning thru all the records. Just tell me that dataGrid RowCount is from:
For j = 0 To DataGridView1.RowCount - 2
For j = 0 To DataGridView1.RowCount - 1
Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
[Code] ......

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VS 2010 Add Directories / Files And Start Scanning?

Apr 21, 2011

I'm re-doing a small application I made a long time ago. It's similar to CCleaner, where it scans specific directories and removes temp files.My old application worked, but it was messy and only had a handful of locations. The new version has a ton more locations and files, but that creates a problem with how the original app was designed.In the old app (I made this a very long time ago) everything was just jammed into the main class, including variables, methods, etc. There wasn't a whole lot of thought put into it.Now, I'm trying to figure out the best way to make this class so when I'm done, I can release it to the community and it be easy to use.The main problem I'm having is how I should set up the methods. There are so many different types of directories and files, that I'm not sure if I should create a separate class for each method, or have a bunch of methods in one class or have one method in one class.

There are some directories that need to be searched recursively, some that don't, some files need a filter and others don't. I think that's the extent that I need.So, what do you all think is the best option so that it will be easy for the end user to just add the directories/files and start scanning?Right now, I have a base class that has two properties. One for directories and one for files, both of which are arrays.Actually, just as I'm typing this, I'm thinking I could create a class that represented a directory and another that represented a file. Both classes would have properties set for them that I could use in the main scanning class. That would allow me to identify what was needed for that directory/file, like recursive searching and filters.

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Barcode Scanner - Write Own Firmware For A Scanning Device?

Aug 29, 2011

i was wondering if it was possible to write my own firmware that will run on a device im making. This device is very similar to the price portable price checkers you see in grocery stores. it scans the barcode which returns an id number. More information about my device and about the big project im working on can be found here: My Idea For A New Type Of WCP (Wireless Connection Protocol)


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Designing Magic Square - Scanning Array With Function

Mar 18, 2011

I'm designing a 3 x 3 Magic Square, where the 3 x 3 tables are made of up three adjacent list boxes. Upon starting the program, the 3 x 3 square consists only of the character "?" to represent a variable that has yet to be defined. The user will input through text boxes and button presses the characters 1 to 9, replacing the highlighted undefined "?' with the desired number. I'm required to include a Function procedure that can, at any time scan the 3x3 table and return an integer value of -1 if an undefined character "?" is present, a value of 0 if the rows, columns and diagonals do not sum to the same value, or the sum common to all rows columns and diagonals.

To start with I defined a 2D array and undefined.
Dim mSquare(2,2) As String
Dim undefined As String = "?"

Then I used a Sub to set the 3x3 table as undefined which I did not show to save space. Next I used a Sub to update the highlighted characters, allowing only one list box to be selected at a time and which I hope also assigns the the values to the array as they are updated. I removed parts of the code so this post isn't too big.

If lstCol2.SelectedIndex = -1 And lstCol3.SelectedIndex = -1 Then
lstCol1.Items(lstCol1.SelectedIndex) = input
txtInput.Text = ""
End If
For i As Integer = 0 To 2
[Code] .....

What I'm stuck on is the Function design. I'm trying to design something to scan the array, and give back an integer depending on the results, which are to return an integer value of -1 if an undefined character "?" is present, a value of 0 if the rows, columns and diagonals do not sum to the same value, or the sum common to all rows columns and diagonals.

I'm currently trying
Function checkSquare(ByRef mSquare As String) As String
For i As Integer = 0 To 2
[Code] .....

At the moment I keep getting the error "Public Readonly Default Property Chars(index As Integer) As Char". I keep getting an error like this even using a single variable and defining each j individually, and I'm wondering if its possible to pass arrays to functions or do I need to do something else. Is what I'm trying to do even possible? I did a longer method in which I just check all the entries individually but I'm hoping there is a more efficient way. Its my plan B for now.

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Error When Scanning Dir Info On Access Denied Folders

Jan 7, 2010

I am scanning dir Info to gather data like size and dates but on access denied folders on the bellow code I get access denied error. How can I avoid this error and just skip over folders?[code]

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VS 2008 : Scanning A Hard Drive For A Certain File Type?

Mar 29, 2010

I wrote a program that can kinda of read Docx files. I can extract the text of the file and the metadata that word puts in the file not the stuff you see when you write click and go to properties. I Can extract and view that data I'm working on making the subroutine (i don't know if its an algorithm there is no math.Anyway I want this to be a forensic program where it will scan the whole hard drive and add all the docx files to a listbox. I found this code

Dim file_names As ReadOnlyCollection(Of String)
Dim directory As String = "c:"
Dim searchFor As String = "windows"


but some folders that where hidden like $inplace they were left over from my windows 7 upgrade. they cause it to crash. is there anyway to be able to scan every folder on the PC. I tried launching the complied .exe by right clicking and hitting run as admin but it still crashed when i executed that code.

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.net - Pdf Printer Driver C#?

May 28, 2011

I am looking for a free open source .Net based (prefer C#) pdf driver. where I can download one?

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Best Solution To Use A DLL / Driver

Feb 25, 2010

Im working with a CD722UN Customer Display for our POS application. it comes with a USB2.0 connection and a installation package containing a driver etc. now, for my application. how should i do when i want to access this driver? at the moment i'm using the "CD722UN application"s .dll path but that can wary from clients OS etc. [Code] my first thought was to first check if there was a device installed in the device manager and somehow use the driver from there? [Code] what is the best solution?

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Create A Driver In NET?

Jul 15, 2009

I'm pretty sure the answer is no but I am curious, is it possible to write a driver in .NET code? I am talking more software driver here rather than hardware driver (ie something like a file system filter as opposed to a driver for a printer or something).

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Mongodb Have A .NET Driver?

Jun 23, 2012

Is there a tutorial on how to use VB.NET with mongodb?

It uses C#. However, I am used to VB.NET. Can the C# driver interact with VB.NET?

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Writing USB Driver With .net?

Mar 30, 2009

I'm starting to get into the microcontrollers and I was wondering if anyone had any experience using visual studio and/or visual basic writing drivers and application software for USB Devices and using different microcontrollers from Atmel and Microchip?

If you know of any good websites or anything out there that would get help get me started that would be great.

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