I have two arrays which I am graphing. I want to use VB to calculate the slope and intercept of the resulting graph. I'm using the Analysis.Math function of measurement studio. Here is what I have so far.
data_array(logtimes, 2) = temp
data_array(logtimes, 3) = log
Dim slope1 As Double
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I have to calculate y = a + Bx or y = mx + b in non engineering form. Anyways I have to calculate the y intercept first and am having trouble calling the function from a module. Here is the module and the second window will be the code from my main form
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I wish to intercept print jobs, read who they are from etc, and then only print them, if the program wants to.
View 1 RepliesI play a midi file using this simple win32 api call:
MidiMsg = "open " & c_midiFile & " type sequencer alias mid1 notify"
ret = mciSendString(MidiMsg, "", 0, Form1.Handle)
MidiMsg = "play mid1"
ret = mciSendString("play mid1", "", 0, Form1.Handle)
Callback message MM_MCINOTIFY has a value of &H3B9 (found it using "spy++")I have to know when this message (MM_MCINOTIFY) is fired and read his parameters. In an old version of code I've written years ago in VB6 i had to use CallWindowProc and SetWindowLong win32 api, but now in VS2005 i cannot get it to work.Still I have to try with unmanaged code or are there any other ways to do this in vb .net?
I want to be able to intercept a print request and then check whether the current user of the computer has enough credit to print. So once the request is intercepted i want to check the total number of pages requested and check against a database how many pages this user is allocated to print, if the total number to print exceeds the number in the database then cancel the print job and notify the user
View 2 RepliesIs there a way to intercept POST data like HTTPAnalyzer?Can I make a call to send the data, see how it's formatted but actually block the connection if I know where it's coming from?
My goal here is to replicate the sending of an email through an SMTP server.
This is not a programming question but a physics one.I was wondering if anyone has a link that good give me the math for two objects: one moving and the other intercepting. Specifically, I need to determine the vectors of the pursuing object when given the vectors of the object he is trying to pursue.This is classic video game programming and in my instance it's supposed to be a football player running with the ball being chased by a tackler.The code I have now determines where the tackler should go at one particular instant, but does not project where he should be in order to lead the target.What happens is the tackler runs behind the ball carrier - he doesn't cut him off.It's like if a QB throws the ball to where his receiver is instead of in front of him; when the ball arrives the receiver is long gone.
View 2 RepliesI am looking for a way to possibly intercept the point that a file is being accessed on a network share. Specifically before it is determined whether the user has access to the file or not.The goal will be to grant access to that file if the file request is coming from a specific process and that user currently does not have access.
View 1 RepliesI am learning Visual Basic 2008. I have created a form with a datagridview bound to a dataset. I also added a button to the datagridview. When the button is clicked I want to be able to update a couple fields in the grid with new values. How do I intercept the click of that button?
View 4 RepliesIs it possible to Intercept a Game's forcefeedback message wich was sent to a joystick? WM_???
I only need to intercept that message, nothing more.
i've read about hooking (wich is illegal??), but its very difficult, and i do not know the c++ language, but i know vb very well.
When a user clicks on the little red "x" a.k.a. the form close button on the form command bar, what even is activated besides FormClosed()
I know FormClosing() is called, but I cannot really stop the form from closing after my code is run. I want to be able to show a messagebox that asks if the user wants to exit the form or not. Obviously if they click no, I want the form to stay open, how would I do this?
This may seem complicated but it's a somewhat basic concept, just probably a complicated execution, I am trying to create a program that will allow you to basically "IM" between computers on a LAN network. That's the concept, I plan on doing this by generating .bat files, executing them and printing the last few messages sent in a label, the big problem I have is receiving messages, I have no idea whatsoever how to even go about finding out how to take the messages received from the messenger service and print them into the label, any ideas?EDIT: This is in VB.Net 2008
View 5 RepliesFor my webbrowser application I would like to have a separate form to display online pdf files.Does anyone know how I would check to see if a clicked page link points to a pdf file and if so open form3 and load the file into the pdf reader component (pdfread) without causing the webbrowser to navigate to the link, this always seems to open the pdf file in a new instance of internet explorer.
I realise that to load the file into the pdf reader the code would be
pdfread.loadfile(whatever file)Hope I've explained this properly.
Not an "ad" popup, but a prompt or a "yes/no" question.
View 5 RepliesI am trying to calculate the number of years for my calculate age event handler, however i am apparently missing a method or whatnot because im trying to calculate the age , can anyone suggest help on this. I need to subtract years to get my age but when i try the birthdate.Subtract (currentDate) method i get an error about not able to convert from LONG?
So below is what I have.
Private Sub btnCalculateAge_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculateAge.Click
Dim currentDate As Date
Dim BirthDate As Date
Dim Age As Long
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I've adapted the code from this link to use the WinXP on-screen keyboard (osk) for a touch-screen application written in VB.NET v3.5. The osk fills the bottom half of screen etc. and behaves fine except for one little quirk. If the user clicks or taps anywhere on the 'background' area behind/between the virtual keys (within the main osk window), the color of the area changes to that of the keys when any further key subsequently gets focus. The outline of all keys is then lost because they are visually merged into the osk window background. The osk must then be terminated and re-launched to remove the confusing appearance.
This behaviour only occurs when the osk window is set to the child style (i.e. when the menu is hidden), using the SetWindowLong P/Invoke function - e.g.
SetWindowLong(OskProcess.MainWindowHandle, GWL_STYLE, WS_CHILD)
It's as if the entire area behind the keys is being treated as another key when tapped/clicked, whereupon its color is 'restored' after losing focus.Is there any way to intercept and somehow override the focus event of this osk background area?
Is it possible to make a program intercept and stop certain write requests? I need it to stop viruses from tampering with an antivirus database. If you can, how do you do it? If not, is there another way to stop viruses from changing the database?
View 39 RepliesI'm wondering if it's possible to create a listener type application that would monitor webaddresses that the user attempts to go to. And can then either block or redirect the browser to another website. Purpose: I know this seems to sound a little weird but what I'm attempting to do is a NetNanny type application that can run on the user's PC and the allow, prevent, rewrite (would look for particular keywords and rewrite them "words I wouldn't want my 7yr old seeing or reading), or redirect to other webpages. I would also like to be able to handle both IE and Firefox browser with this one application.
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I am trying to make a program that when run changes the <title> attribute of the HTML, on any page requested then loads the page (IE). Is this possible, without making a new browser? If so, how?
View 3 RepliesI'm trying to make a LAN IM client using the net send command and I was wondering if there is any way to capture the text of the messages received through net send and display them in a label.
View 6 RepliesI have a situation where I am handling both single & double mouse click events on a form. In both cases something has to be loaded, however when a double click occurs, I do not wish to execute the code attached to the single click event.Is there a way to intercept the mouse click's and check if double or single and then execute the right event appropriately?
View 2 Replieswhen i enter the date of birth using the datetimepicker box it automatically compute the age and output in a textbox.text?
View 2 RepliesI have the following code, the answer should be 2 though I am getting 3 everytime
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I use the following columns stored in a SQL table called tb_player:
Date of Birth (Date), Times Played (Integer), Versions (Integer)
to calculate a "playvalue" (integer) in the following formula:
playvalue = (Today - Date of Birth) * Times Played * Versions
I display upto 100 of these records with the associataed playvalue on a webpage at any time.
My question is, what is the most efficient way of calculating this playvalue given it will change only once a day, due to the (today-date of birth) changing? The other values (times played & versions) remain the same.
Is there a better way than calculating this on the fly each time for the 100 records? If so, is it more efficient to do the calculation in a stored proc or in VB.NET/C#?
I have an openfiledialog, I show the dialog and the user selects there file. How could I calculate the MD5 hash of the OFD.filename/file opened? Or calculate the SHA1, what ever is easiest.
PS: This is in Visual basic 2010 Express.
Dim
Field1 as
Integer
() = {0, 1, 2, 3, 4, 5, 6, 7}
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i have the numbers in listbox as below:
01
02
04
09
10
the question is ..how to calculate different between all numbers... exampel between 04 and 09 ,we have 05,06.07 and 08 between 09 and 10 is 0
I have buttons with values. for exmp. btn1 = 5.50 btn2=3.25 etc...when someone click on btn will ask how many of these and let say you say 3 it will multiply that with 5.50 and show it on listbox.
View 1 RepliesI have a project to calculate how many day is there before 05/12/2010.
View 10 RepliesI am struggling with this code that I Have to do about calculating the nth term of the Fibonacci series. The program is supposed to take the value of n and return the corresponding nth Fibonacci number.If the function is given an
invalid n value, it should return -1.
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