How To Programmatically Disconnect Screens
Nov 21, 2011
I have a PC with four LCD monitors attached, but often I leave it unattended and need only one monitor running. I've set up power strips so that I can flip one switch on a power strip to turn on or off the other three monitors. The problem is, when I turn off the other three monitors, the computer makes the disconnect sound every few seconds. you can go into Control Panel->Display->Change display settings, and under 'Multiple displays' disconnect the monitors you are not using, and them reconnect them when you need them again. However, this is time consuming to do manually.can I program this in VB .Net, i.e. is there a Class or some registry keys that I can use to connect or disconnect monitors the same way as through the Control Panel?
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Aug 29, 2008
I am using VB 2008 Express: The template forms for splash and about screens have a background image
consisting of 3 circles (orange, green and blue).I would like to use this image throughout my app,
but can't find it anywhere.Does anyone know where this is located in the visual studio program
structure?
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Aug 20, 2009
I am aware of the Screen class, but when trying to use Screen.AllScreens[0], I get something like .Device1. Instead, I'd like to have my screen's name, something like HP 24' something.
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Jan 17, 2009
It is possible to disconnect an IP in a port? I have a MMORPG server, and I need kick bad players using IP of this player.
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Apr 2, 2010
I connect an OPC server, I can get Datas, But when i try to disconnect from server Opc server's clients size does not decrease until program closed.[code]It gives no error. It removes all items from GRP1 but cannot disconnect.
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May 6, 2011
I often use VBA to automate internet explorer and interact with web sites.I can find links on regular URLs I navigate to, fill in forms on them, etc.But I don't know what these types of windows are that come up or how to get a hold of them to click links on them or enter text in their forms if there is any. It comes up then grays out the screen it came from. It looks like its some java popup or something. I'm not interested in the site this is from, its just an example of one to show what I mean. I've been searching and looking but can't figure it out.
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Feb 11, 2011
I have 2 screens, and 2 forms. I want each form to fill a screen, so I did the following code:
s = Screen.AllScreens
f1.Bounds = s(0).Bounds
f2.Bounds = s(1).Bounds
(s(0) is my primary screen, and s(1) is above it.) F1 fills s(0), but f2 does not fill s(1). The size of f2 is set correctly but the location is set to (50, 0) instead of (0, -1024). Maybe location won't accept negative numbers? If so, how can I get my form to the other screen?
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Jun 25, 2010
I want to develop a score card to s small stadium it will have 2 42'' LCD i one lcd i want to put the team's name and score
the lower screen i wan to to elapsed time, remain time and first or second time is it possibel Visual basic 2010 (visual studio 2010 Pro), to display on form in one screen and the other form on the other screen
It must be to setup, so that the user does nothing but to put the name of the team's, the the score?
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May 30, 2006
I'm viewing reports on a VB.net form using CrystalReportViewer. Once a report is opened, the Access database that is used within the report is locked (i.e., the Access MDB file can't be deleted). Even after the report is closed, the database stays locked until the VB.net app "ends". This is a problem because I want to be able to delete the MDB file at some point while running the app and can't. The VB.net app starts by opening a form named "Startup". No database connection occurs here. A button is pressed using this [code]I must not be properly closing the CrystalReportViewer or the Report form.How do I close the Crystal report and unlock/release the Access database?
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Nov 24, 2010
for a test project that i'm doing i am looking for ways to program a LED screen. I ordered a few LED screens (320x160) that can be connected together). Using a special controlcard the whole thing can then display text etc. Using the software that a Chinese supplier gave me. All the above works fine. But I am depending on the software I have. I have VB.Net experience and I would like to put the software aside and write my own software. I would like to set up the COM connection and tell what LED to activate.
Problem i'm facing is that the chinese cannot provide me good use of the software dll files. I need a small Vb.net program that does the above. Would somebody be able to figure out how to do this.
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Aug 27, 2010
I am currently working on a messenger client that connects to a server then back to the clients for full chat room support.I have it operational however when you close the client before connecting to server it closes normal, if you close the client after you have connected to the server then the client dissapears but it is still running in processes. To make it worse if you close the process it then kills the server.What I need is a disconect button code so it will stop crashing it.Here is my code Client:
Imports System.Net.Sockets
Imports System.Text
Public Class Form1[code]......
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May 24, 2012
I Have created an application with MySQL as database server.everything goes fine.When i tested the application on multiple system at a time.When i monitored the database server (MySQL) I saw huge number of connection to the database. and all are in sleep mode.I used below code for connecting and closing connection after every query.
'Connection variable declaration
Public conn As New MySqlConnection
'Connection Opening command[code]....
But i see huge number of connections in sleep mode at database server.
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May 22, 2010
ok i got this from online source the only problem i found with it is it will not disconnect from the server on a regual basis, now i did some mods on it but nutting to change the way it works i am using vb2008 the server side i have no problem with it. here is the code for the client:
[code]...
i just can't get it to disconnect on a regular basis only maybe 50/50
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Sep 5, 2011
For an answer to this questions I've been looking years from now, then I couldnt find it and now it's complicated. I am working on a project to fully manage a computer's connection, it can check IP, change it, etc. But, I really, really need a function to sucessfully connect/disconnect a PC from the ineternet without promps or other screens, IPCONFIG and DHCP command aren't useful!, im exploring RAS but couldnt come to anything yet
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Sep 20, 2011
Private Sub Resizescreen()
Width = Screen.AllScreens.First.WorkingArea.Width
Width *= 2
[Code]....
I am using this to size the screen to two, but not sure how to be able to tell if it is a multi monitor display.
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Apr 13, 2011
I am writing a program that tests our hardware write blocker units.When i send it the command to delete a text file on the device it should ONLY respond with my error message coded with a try...except statement.However the error message seems to be coming from windows 7 when it says "The disk cannot be written to becuase it is write protected. Please remove the write protection from the volume POCKET in drive F:" then it has the buttons Cancel, Try Again and Continue. If i click on Cancel or Continue then my error message comes up.Is there anyway I can suppress the "The disk cannot be written to." error message in Visual Basic 2010?
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Aug 6, 2009
I want to disconnect to the internet. And i tryed Process.Start("ipconfig.exe", "/release") I was told this in another thread but its not working
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Jul 26, 2010
I'm building an application that essentially attempts to fill up all of the user's screens with a maximized form. On most machines this works. I'm simply using My.Computer.Screen.AllScreens enumeration to get a reference to all the user's screens (assuming a multi-screen setup). I'm then using the following to set the forms:
[Code]...
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Jun 23, 2010
Lets assume that I have a game server in my computer.
I download a compiled game, server/client side.
The player starts the game and it keep sending and receiving data from the server.
Lets assume now, that I think that the player is using some bug and winning all the rounds. How can i disconnect his IP from the server port? I have seen some people using some kind of DLL to do the job. Its something like iphlpapi.dll ... i dont remember well.
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Jan 12, 2012
In the very near future I'll have to develop an application that uses multiple screens.
So I'll give you a practical example:
I have 4 screens where different pricing infomation is being displayed. At any given time, I have to show a Promotion which is a single image that needs to be displayed across all of the screens with text scrolling across the screens.
Now I'm wondering what the best way would be to achieve this.
At first I was thinking of using one form and to stretch it across 4 screens, while I create 4 'areas' on the form that represent a screen. However when you extend a form this big I'm afraid the text is going to look horrible.
Then I was thinking of using 4 forms and split up the image into 4 different images which are displayed on the different screens. However to get a scrolling text right on 4 different forms, that's going to take some trial and error.
how I can achieve this form of digital signage?
I want to use VB.Net unless this would seem impossible and I have to use other software?
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Jan 14, 2011
Issue : Is there any efficient way to arrange many independent Windows Forms in .Net? I have to display many forms at the same time in my application. It is a graphic charting application, and the number of forms depends of what the user wants, so it has to be dynamic. Is it possible to arrange it like with MDI Layout ?
Example: For example, if user chooses 12 output chart forms, I would like to have them auto-arranged 4x3 on the default screen. Ideally, User could even choose many target screens among the monitors he has.
Why not use MDI: I do NOT want MDI, since my application is multi-screen and I want to leave the opportunity to the user to put his external output chart windows scattered over different screens wherever he wants. But I would though like to have a default arrangement of output windows, without calculating manually screen and forms width/heights by dividing and stuff (Already doing this, it's a real pain). I would like to spare myself this ant-work and focus on business logic.
What I am looking for: If somebody knows an open source library or tool or cool method that could be great. By the way, I found a very useful and handy tool that could help people having the same needs I am formulating here: It is named AquaSnap, but unfortunately code is not Open Source. PS: Again, I Know how to do it "by hand" and assign monitors to forms. It is not the kind of answers I am looking for.
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Jul 29, 2009
How can I detect when a client disconnects from the TcpListener ?
Each of my clients is handled in a separate thread.
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Oct 16, 2009
I'm writing a little application that needs to detect when a USB Mouse is Connected and Disconnected. I am running into a dead end when trying to determine the best way detect this. I have tried WMI and WmdProc but I think I am hitting a mental block trying to figure out the best option.best way to listen for the connection and disconnection of a USB mouse?
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Mar 2, 2010
I've tried this example directly from MSDN:
Dim Screens() As System.Windows.Forms.Screens
and I can't find a way to get a reference to the Screen. I've checked my references and they seem fine but I may have missed something. Anyone experience this or know of a bug?
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Feb 10, 2010
I access directory from local network in my application.[code]my application is continues running. but sometime network is disconnect for a second and then automatically reconnect. so execution of application is stop with error in message box that path could not found.
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Apr 10, 2010
I'm trying to make a chat room that when the user connects hes added to a listview. Im having trouble on how would i remove that client when the user disconnects.
I understand that you can do ListView1.Item.RemoveAt(Sender) but that would not work because RemoveAt only accepts integers.
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Mar 7, 2012
I have this cod to take a picture of this location
[Code]...
but it uses the edge of my screen as 0,0 how could i make 0,0 the edge of the application. Edit: ALl i know to do was copyfromscreen butthat uses the screen
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Dec 23, 2011
Searched quite a bit and am having trouble finding how to have the server catch the client has disconnected. When the server detects the disconmnect it goes bonkers. Would like to Try and Catch ex so I could gracefully handle it.
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May 17, 2005
I'm using the chat program provided in the 101 examples kit, and have modified it a bit to suit an app i'm fooling around with. I have come across a problem...
When the client side crashes, the server side doesnt realize that the connection has been lost. Is there any way for the server to poll its clients table to figure out which streams are still open?
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Mar 5, 2010
I am new with VB.NET 2008 and I would like to know how to make a project so the forms will show correctly on various sizes of monitors. Do you have to put code in every form for this?
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