Totally Clear A Picture Box?
Feb 26, 2012
i m creating a key logger in vb 2008 for my home computer that can send keys records & screen shoots at my E-mail. It has a textbox, 3 buttons, a picturebox and some timers,
actually the process is that in every 3 minutes button1 take a screen shoot (at 2.90 minutes) OK, then button2 save it in "C:/mydir/hidden folder/" (at 2.95 minutes) then button3 send it via Email as a attachment (at 3.00 minutes), its work
fine in first round or first 3 minutes.
but in Repeating Process or in 2nd round or after 3 minutes it give error that means image is in use, I want to break the link between image and my program (key logger) there for my keylogger can delete or REPLACE old Screen Shoot With New On.
and the process repeat again & again, and send Screen Shoots With NO error.
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Feb 26, 2012
I'm creating a key logger in vb 2008 for my home computer that can send keys records & screen shoots at my E-mail. It has a textbox, 3 buttons, a picturebox and some timers,actually the process is that in every 3 minutes button1 take a screen shoot (at 2.90 minutes) OK, then button2 save it in "C:/mydir/hidden folder/" (at 2.95 minutes) then button3 send it via Email as a attachment (at 3.00 minutes), its work fine in first round or first 3 minutes.but in Repeating Process or in 2nd round or after 3 minutes it give error that means image is in use, I want to break the link between image and my program (key logger) there for my
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Dec 11, 2011
How do you make the image in a picturebox vanish when you change an option? I have tried a few different ways that i have seen but none have worked. I have it set so when i change an option in a listbox it will change the picture and data in other controls, however one option in the listbox has no data to fill in those controls and so gets left blank. However when i click on that option right now the images that were in the picturebox before get left behind until i click on another option that has a picture. So how do i remove the picture from the box?
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Jun 13, 2011
When btnSetup is clicked, 7 rows with 24 colored predefined rectangles are displayed in the pbColors picture box as as intended. The controls on the first page of a tab control. I would like this display to remain intact when I change tab pages but when I return to this tab page the picture box is cleared. If I click the button, for some reason the group of colors is displayed twice, one after the other, instead of once as intended.
[Code]....
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Aug 18, 2011
I'm writing an internal web application right now (with ASP.Net Web Forms), and it presents an odd problem. I have to be able to impersonate the currently logged in windows user, and execute a command based on their Windows Authentication to log in.. AND ... if they don't have Windows Authentication set up in the application I have to use to log them in, I have to be able to accept a user name and password. I also have to write the application in .Net 4.0, and secure it as much as possible. I got this to work by NOT utilizing Windows Authentication or Forms Authentication in the web.config, and instead setting session variables to guard against user accessing pages in the web app other that the log in. I did this by creating an oddly name session variable with a value based on their user name (windows auth or not), and then a secret session variable. The secret variable is in the web.config as a 256bit encrypted string, in which I decrypt, and set as the session secret. In order for the page to load, the first session variable can't be blank, and the second variable has to equal the decrypted key value... if the variables don't pass inspection, it redirects them to the login page. I set this up on every page, generic handler, and webservice method in the web app. I make the session timeout after a few minutes of no activity, and on log out, I set all session variables to nothing, and expire all cookies. (I also disable all cache).
My question is... Does this offer comparable security to that of Forms authentication? I have always used Forms authentication, but can't use it here. If I did, the users would have to reconfigure settings in IIS and in he web.config to toggle login procedures (From my knowledge, you can't use both Forms authentication, and windows authentication to manage the security of your pages and other web resources). With the method described above, I can accomplish the best of both worlds, but am curious about the security of my methods. Is there anything else I can implement here to assure the utmost security other that using forms authentication? Is it possible to accomplish the same level of security of Forms authentication without using it?
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Apr 30, 2009
Imagine i have two form frmOne & frmTwo when i load my application , frmOne load , than there a button to go frmTwo , upon clicking the button ,frmOne doesnt hide or close when in the code i put ( me.close) also tried (me.hide) upon button click
Than From frmTWO , there a button to go back frmONE( i use the code frmOne.ShowDialog() )i click it throw a error saying :
"Additional information: Form that is already visible cannot be displayed as a modal dialog box. Set the form's visible property to false before calling showDialog. than i tried to set visible to false before .showdialog still got error saying :
"Additional information: Form showDialog tried to set an ineligible form as its owner. Forms cannot own themselves or their owners."y is this so , is there any other way to close a frm etc etc ?
What i trying to achieve is : when i choose to go frmTwo , frmOne muz close , than from frmTwo if i wan go to frmOne ,Frmtwo muz close
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Nov 29, 2009
I'm currently working on an application that detects a color on a defined area on the screen and together with a panel that displays the color I show the values in a label and represent them with a vscrollbar. (The goal of the project is to output the color of the computer screen via an usb to dmx interface to create an ambilight effect) Now I don't want the user to be able to move the scrollbars up and down so I figured disabling them would do the trick but then the little square you click on to scroll it up and down isn't visible anymore.
Vscrolbars enabled:
Vscrolbars disabled:
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Dec 22, 2010
How to operate menu items through keyboard....
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Aug 23, 2011
I have a TabControl placed on Form. which is a VB.net windows application. I want to set tabcontrol border totally invisible similar to the formBorderstyle = none I am unable to find any settings for the tabControl to remove the visible border.
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Dec 13, 2011
this is currently my code to clear my 5 textboxes
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
End Sub
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May 17, 2009
I have a timer that runs every time by itself, and for the code the runs in it I would like to have it clear the dataset before it does anything, the timer runs every 10 seconds, so I tried to do dataset.clear but it would crash if the dataset had no values
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Jun 23, 2011
in hyper teriminal when i press "ctrl+L" is to clear terminal screen how to write the code in vb.net? Hyperterminal is connecting to serial comport.when i try this it work and return line on debug
serialport.writeline ("at+cmgl=1")
i try this but not work and it still show some lines on debug
serialport.writeline (vbcrtl +"L")
serialport.WriteLine("vbCrLf + l")
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Dec 15, 2010
How can I improve this bit below to make the items in the TreeView to sort faster or something totally different to sort them easier?
[Code]...
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Sep 20, 2010
way to clear textboxes in VB.Net and what is the difference between the two methods? I have also seen people be critical of folk using clear objects on their forms and i can see why but in this case, i am only learning.
txtbox1.Clear()
or
txtbox1.Text = ""
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Jul 15, 2009
wan to ask about anyone know the code about how to clear all the data inside the data grid view without clear the binding source...
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Jul 4, 2009
I have a class that needs to create another class (that inherit from window). This second class build a set of controls in a new open window.
Because the process of building this new second class it quite long
I need to open this new window in a different thread
I am trying to do this with a backgroundworker but as soon as the new class starts to build the interface (textboxes etc) it casts an error saying that the thread must be static
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Aug 26, 2009
I'm writing vb.net code with MS Visual Studio 2005.When running my application I get "foo.exe is already running on this machine".(Even though I'm running faa.exe instead
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Feb 28, 2011
In my winform program (in vb.net) I wrote:
Dim dt As New DataTable
'Get data from DB into dt
'...
[Code].....
But when I run the program, Clear() cleared both dt and dttemp! Why? Aren't dt and dttemp supposed to be two distinct instances of DataTable?
(I finally found a solution - dttemp = dt.Copy() instead of dttemp = dt. But I still can't see why Copy() was necessary in this case.
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Mar 26, 2010
I am using the StreamWriter to create a log file for my application. However I do not see a method on how to clear the file (make the file blank again). Also before I clear the file I want to rename it so that I can have multiple log files, a new one produced everytime the application runs.
[Code]...
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Mar 15, 2012
1- how I can put picture in tool strip and put it convert to split button without the picture go invisible when i click on it
2- how can I make tabs in the forms
3- I want to put pictures in the form in the same place For Example when the user check the radio button or when the user choose the name in the combo box a specific picture should be display?
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Oct 15, 2011
how to display picture using the Application.startup path? i want to locate the picture in my bin folder inside my debug folder as i selected the name of the candidate in the combo box.
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Dec 27, 2011
Imports Word = Microsoft.Office.Interop.Word
Public Class Form1
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Dim a As String = My.Resources.picture
[code]....
I wont this in table.cell (3), from listbox2
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May 22, 2009
I want to add a .ico to a notifyicon, but i get this message:Argument 'picture' must be a picture that can be used as a Icon?What is the problem? It is a .ico file..
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Aug 20, 2011
I have VS 2008 and use VB, not C#/C++ or whatever else. I'm trying to make a battleship game, and I've decided to use the only method I can think of to control the grid. A 2D boolean array for position marking. I have the array set up, and the grid set up in the design form, but I can't figure out with all my research how to link them together. I'm writing this program to shake off the rust before school starts again, and for fun. I took VB in school last year, a half year class, so I have a foundation, now I'm self-educating myself above and beyond the class. I've searched for a way to use a picture box array to use the coordinates of the ship to .Visible=True the picture boxes. I've been working on this for 2 days straight with no results. I just need a little nudge in the right direction. The exception I've been getting with my latest concoction of code is NullReferenceException was Unhandled. I think its referring to the fact that I have no idea how to link the picture boxes into the array. Here's my code, and I'll comment where the exception is thrown:
Private Sub cmdStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdStart.Click
'label for GoTo statements is Tryline:
[Code].....
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Apr 3, 2012
I have this code in my system which I use to retrieving images from a database by formatted blob. But some database records don't have pictures ([BLOB - 0 B]). list code for me to place an error picture in picture box1 when a picture is not available.
Dim bytes() as byte
bytes = (objdr("picture"))
Dim memStream as New MemoryStream(bytes)
PictureBox1.image = Drawing.Image.FromStream(memStream)
I'm using Microsoft Visual Basic 2008
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May 17, 2012
How I can by clicking a button on my app. open a picture in a picturebox with MS Office Picture Manager?
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Jul 14, 2009
how I can by clicking a button on my app. open a picture in a picturebox with MS Office Picture Manager?
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May 24, 2009
how to drag and drop a picture box that it loaded over another picture box..
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Oct 8, 2009
In a form I have two picture box and I want to drag the picture from the picturebox to a blank picture box and have that picture pasted there, how do I do that? I'm using VB.net 2003.
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May 10, 2010
I need to display a arrow picture over another picture. But i cant able to make arrow picture transparent other than the arrow. Always it is in rectangle format(Picture box). I tried the picture box color to transparent, But that doesn't worked. A separate user control for displaying transparent image will be appreciated.
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