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With forms there's the Control.MouseHover Event.
To implement your own, something like this maybe...
How to detect NO mouse movement[^]
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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Timers are easy, don't worry about that.
I'd say create a timer and start it then leave it running until your application closes.
Inside the callback for the Tick event increase a counter, if the counter is above a certain value then you can do whatever it is you need to do. Inside the MouseMove event, reset the counter to 0.
Timer Demo[^]
All you really need are the 4 lines at the beginning of the constructor, and you can just add a timer in the designer too, and set it up there.
My current favourite word is: Nipple!
-SK Genius
Game Programming articles start - here[ ^]-
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Thank you SK Genius
Yes it sounds simple I'll try that
However I do not really see what the other solution "Mouse not move" is doing beside this one
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Mark just made his post as I was still writing mine, either way would work just fine.
My current favourite word is: Nipple!
-SK Genius
Game Programming articles start - here[ ^]-
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Hello SK Genius
Your method sounds good !
A little question
I have the Idea to use the timer only when the mouse is on the concerned control
So I will do a Timer.something(); for the MouseEnter and a Timer.anotherthing() for the mouseLeave
The question is what thing :
Timer.enabled=true;
or
Timer.Stop();
What is the difference ?
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Did you completely ignore my post?
Did you look at the code at the link I provided?
Are you using Windows forms? If so did you know mouse hover
functionality (which is what you're doing) is built in?
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Hello Mark
I'm sorry
No No I do not ignore your post but I thought that the other solution mentionned was similar to yours
For mousehoover : I 've tried this event a few month ago on a picturebox but discard it
As far as I remember I've found that MouseHoover only trigger once at the first stand_by on the control after entering the control. To get another MouseHoover I have to leave the PB and reenter
But maybe I'm wrong ???
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Hello Again Mark
Ok I understand now that you are using Stop() / Start() sequence to reset the timer
But it is very similar as the counter ... No ?
My other question remain : what is the difference between Start / Stop
and
enable / disable
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baranils wrote: But it is very similar as the counter ... No ?
I'm not sure what counter you're referring to - I missed
something somewhere 
baranils wrote: what is the difference between Start / Stop
and enable / disable
No difference that I see besides Enabled being a property and
Start/Stop being methods.
Mark Salsbery
Microsoft MVP - Visual C++
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SK Genius suggest to use a counter
Increment the counter at every Tick interval
Reset the counter at every MousMove
I like this method because it allows to decide wich action to take depending of the counter value
Fast action for lowest counter
Much time consuming action for higher counter
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Ohhh - Got it, thanks
Mark Salsbery
Microsoft MVP - Visual C++
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Hello
I one more Question
Now I catch the MouseNotMove event
How can I get the MousePosition on my picturebox at that moment ?
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One way is use the Cursor.Position property followed by
the Control.PointToClient() method.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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Yes got it too !
But when I try it first I thought it does not work because in debugger the mouse was still active and I was getting another position that I was expecting !
Good to know !!
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I have been trying to do this for some time now, and at one time, before I gave up, had code from 2 different people, 1 in VB for detecting the thumb drive being inserted, and 1 in C# for suppressing Autorun.(Could have been the other way around.) Since then, I have lost both files, and I'm simply wondering if it is possible to code something in C# to do both, and then run a program on that drive(PortableApps). My biggest problem is that I know very little C# or any other language for that matter. I do have a friend that is really good at it, but he hasn't been able to figure it out either.
Thanks in advance, for anyone who takes the time to read this.
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This article covers device insertion detection, not sure about preventing autorun, however.
Regards,
--Perspx
Don't trust a computer you can't throw out a window
-- Steve Wozniak
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thanks for the tip. The autorun suppression has proven to be a problem, as nobody seems to be able to code it in C#, only VB.
Does anybody have a solution to this? 
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hi,
this is exactly my first program, i will be using C#. The device i am using is a usb connected PC digital TV receiver this receiver software actually have a function which measure the signal strength, BER and these data are save into an log file (thus it real time measurement data) once i start the device (start watch TV).
I am suppose to use C# to get the real time measurement and convert it into graphic (line chart).
I have try to get the data for the log file and display it in the textbox using the following code
using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace Testing_1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
StreamReader objstream = new StreamReader("c:\\measurement.log");
textBox1.Text = objstream.ReadToEnd();
}
but this is the error i got : the file been use by another program.
I also try another method which is directly from the usb port which the device is connected to but i am unable to start working on it coding. i had been looking into example of usb_hib and ICSHARPUSBlib but i was unable to get anything out.
Thus please help me, if i am in the right direction (get the data from usb directly?) or do you have any better item on how i should get this done, any code to refer to.
thank so much
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Because your new here and to programming i wont be too sarcastic but here area a few pointers when posting here...
1.) Please use a subject related to your question
2.) Please use pre tags when posting code
Have a look at my article - How to use the code project forums[^]
Now on to your question
Your trying to get the data from a flat text file, and these can only be accessed by one program / thread / object at a time. Thats why you get the FileAccessException, because the program that logs the signal strenght is constantly updating the file.
Now that i think about it, you can open a file that a program is writing too and view it in notepad... so u might be able to do this, as long as you dont try to write to the file. What strikes me as strange in your code is your using just the stream reader... maybe this is the problem... try this
FileStream fs = new FileStream(@"c:\measurement.log", FileMode.Open);
StreamReader reader = new StreamReader(fs);
string fileContents = reader.ReadToEnd();
as for the graphical part, have a look at GDI+
it involves the use of the OnPaint(object Sender, EventArgs e) event handler of a component like a panel, because youll be updating it continuously your going to have to paint on a Double Buffered Panel so that it wont flicker!
Well that should keep u busy for a while if this is your 1st C# program, if u have any questions ill be glad to help if i can.
Good luck!
Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.Passion != Programming & you.Occupation == jobTitles.Programmer)
1000100 1101111 1100101 1110011 100000 1110100 1101000 1101001 1110011 100000 1101101 1100101 1100001 1101110 100000 1101001 1101101 100000 1100001 100000 1100111 1100101 1100101 1101011 111111
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Harvey Saayman wrote: Your trying to get the data from a flat text file, and these can only be accessed by one program / thread / object at a time
Not strictly true. It is possible to set a sharing mode for the file. If you open the file as Exclusive (aka DenyAll or ShareNone) then nothing else can access it. If you open the file as ShareRead then multiple things can open the file as Read Only (so long as they all allow other processes to read the file too)
Harvey Saayman wrote: What strikes me as strange in your code is your using just the stream reader
What struck me was that the file never gets closed. The OP needs a using block around that stream. That is the most likely reason as the program that generates the file is probably expecting readers simultaneous with it writing the file and will have the file open accordingly.
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hi Colin Angus Mackay
thank for your reply
I am not very sure and clear on what you are trying to tell me as I am very new to programming sorry about it.
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hi,
I had try the code you have given to me but I get the following error
IOException was unhandled
Is there an solution for my problem?
Thanks
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Hi all...
I'm writing a small application, that monitors the active excel workbook (The excel window that is currently opened and active). The applicatition then monitors the active-row, get the data from the first coloumb of that row and looks it up in a database.
I have managed to get a reference to excel, using Interop-marshal (see code below), but this only gives me a reference to the first excel workbook opened. If the user switches to another excel workbook, I want to change my reference as well.
Second question: Is there a way to detect if the active-cell has changed. currently I have to read the active-cell continiously to see if it has changed.
Thank you very much, (in advance)
(sorry about my english)
using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;
Excel.Application oExcelApp;
try
{
oExcelApp = (Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
debugLabel.Text = "Lookup ID: " + oExcelApp.get_Range("A" + oExcelApp.ActiveCell.Row.ToString(), Missing.Value).Text;
oExcelApp = null;
}
catch (Exception)
{
debugLabel.Text = "Lookup ID: Ikke Fundet";
}
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Hi all!
Is there a way to capture in C# the user click on a link (in any window) in order to open a web page?
I'd like to code a simply application that make you can choose the browser in which you want to open that page...
Thank you in advantage!
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