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I'm trying to write an application to measure how long I spend using certain applications during the day. Idealy I'd like to get a message/event sent to my program when another selected program gets user focus as well as when it loses it.
I've figure out how to get a list of all running process and get their running information but is it possible to register a callback function to get notified of when another process recives or loses user focus so I can start stop a simple timer?
Cheers!
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A global hook (for example a CBT hook) could give you this info.
There's an article on this topic:Global System Hooks in .NET[^]
Regards,
mav
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Hi there!
I need some help converting files from an AVI movie to BMP.
IS there any component that helps to doing that?!
If not, how can I made one? What do I need?
Thanks a lot, Sérgio
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hi,
We have lot of articles here in codeproject which will deals your requirement. Search for some articles.
Eg . http://www.thecodeproject.com/csharp/steganodotnet4.asp
check whether this will surve your purpose or not ?;)
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S r e e j i t h N a i r
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thanks for your help, SreejithNair
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You might also want to look up this excelent library.
It includes much more than getting bmp's from avi's, but discusses video input and its capturing.
there are no facts, only interpretations
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Hi, I'm using a ListView to display integers and I'd like to sort them, but it processes them as strings... so it gives something that looks like
1
10
11
12
2
3
4
5
...
is there a way to sort them as numbers? I've thought of adding leading zeros to each number but that's not really pretty...
Thanks!
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hi,
ListView have a method called Sort() which will only sort based on alephabetic manner (like string compare). So here what you can do is you can Impliment IComparer interface in your ListView class. In IComparer contain an abstract method called Compare(object a,object b).
And remaing is is upto your logic to compare and getit done. Try your self and if it is not possible by your self then let me know.
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S r e e j i t h N a i r
**************************
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Hi!
By default, the ListView is sorting its items lexicographically, so numbers will not be sorted correctly.
To achive the correct sorting you'll have to write a class implementing IComparer and assign it to the ListView's ListViewItemSorter property.
You'll get two ListViewItem's to compare, so you can decide according to which subitem you want to sort, if sorting is to be performed ascending or descending and what to do with numbers or dates.
For example, the core of such a comparer could be something like this:
public int Compare(object x, object y)
{
ListViewItem i1 = x as ListViewItem;
ListViewItem i2 = y as ListViewItem;
try
{
return (int.Parse(i1.SubItems[0].Text) - int.Parse(i2.SubItems[0].Text));
}
catch
{
return 0;
}
}By modifying the SubItem index you can easily sort by different columns or if you use DateTime.Parse instead of int.Parse you can sort your ListView by dates.
Regards,
mav
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I currently use a axWebBrowser control in my C# application to display html. When non-english characters are in the html strings the control displays garbage. Is there a way to configure the control or format the html string so that the characters are displayed correctly?
Any help is much appreciated.
regards,
AD
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Hi,I am using C# to encrypt file.
Here is the code:
public byte[] Encrypt(byte[] sourceObject,string key)
{
MemoryStream msOut = new MemoryStream();
MemoryStream msIn = new MemoryStream();
CryptoStream encryCs;
long lLen;
int nRead, nReadTotal;
byte[] buf = new byte[3];
encryptMethod.Key = GetValidKey(key);
encryptMethod.IV = GetValidIV(key,encryptMethod.IV.Length);
encryCs = new CryptoStream(msOut,encryptMethod.CreateEncryptor(),CryptoStreamMode.Write);
msIn.Write(sourceObject,0,sourceObject.Length);
msIn.Position = 0;
lLen = msIn.Length;
nReadTotal = 0;
while( nReadTotal < lLen )
{
nRead = msIn.Read(buf,0,buf.Length);
encryCs.Write(buf,0,nRead);
nReadTotal += nRead;
}
encryCs.FlushFinalBlock();
encryCs.Close();
return msOut.ToArray();
}
When the size of file is less than 15MB ,the program runs ok.But when the size of file is larger than 15MB,the program will come out the exception of outofMemoryException.
Thank you,
wybstar
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It would be more efficient to eliminate msIn and the loops, and to use a BinaryWriter to write the encrypted data. Something like
BinaryWriter w = new BinaryWriter(encryCs);
w.Write(sourceObject);
return msOut.ToArray();
(flushes and closes removed for clarity).
my blog
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I have modified the code. However ,the program still met the Exception of OutOfException. I want to know whether the .net not support the encryption of big file?
thank you!
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I am using C#.net to make a program to open and close the cd tray.
I tried using System.Runtime.InteropServices namespace. and MCI . ok
The code is truning hell to me and the sdk got me more confusing. I need somebody to tell me exactly what to do .
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hi,
please go through this link.
http://www.artima.com/forums/flat.jsp?forum=76&thread=3997
this may help you out.;)
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S r e e j i t h N a i r
**************************
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This worked for me:
[DLLImport("winmm.dll")]
extern static int mciSendString(string lpszCommand, int lpszReturnString, int cchReturn, int hwndCallback);
mciSendString("Set cdaudio door open wait", 0, 0, 0);
mciSendString("Set cdaudio door closed wait", 0, 0, 0);
www.troschuetz.de
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Im making a simple media player using managed directx, AudioVideoPlayback. The problem im having is that the video is not playing in the form, it plays in the top left corner of the screen.
here is the code:
Video vid = Video.FromFile(file);
vid.Owner = this;
vid.Play();
im using directx 9.0c summer 2004 update
.net framework 1.1
visual studio 2002, c#
windows XP, sp2
ive tried others code with the same result (MDX sample code). If anybody knows whats going on, Please Help me!
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I got interested in Web Services and found an article at http://www.codeproject.com/cs/webservices/cpwebserviceconsumer.asp; it references http://www.codeproject.com/webservices/latest.asmx, but I get a parser error; is this web service down or has the URL changed? Thanks
Lessons learned from 911:
1. United We Stand.
2. United’s We Fall.
Gulf War Syndrome survivors never have a good day. http://www.vetshelpcenter.com/
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hi,
I found the same question previously (about codeproject webservice). And i didn't seen any usefull thread on that discussion.
Now can you tell me ' how you are trying to use that web service. Is it through IDE or VS commandline ?
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S r e e j i t h N a i r
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i want to use exsisting Libs(MFC + C++) in C# projcts.
could any one tell how to achieve this.
--
malotian
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hi,
You need to go through some concept about Com Interoperability.
Lot of article are there in codeproject which will deals the Com Interoperability (Interop).
Try to search.
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S r e e j i t h N a i r
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i have gone through the interop services and what i have analysed is
---------------------------------------------------------------
.net interop services offer support to integrate c-style dlls into your c#
code i mean managed code,
but not same for unmanaged c++ class libraries. if you want to make calls
into an unmanaged c++ class library, you definitely have to write a
wrapper class, and you have to write it in managed c++.
i think there is no other way out.
----------------------------------------------------------------------
now problem is i have (mfc + c++) libs & dlls only. i dont have the code
with me. so i can't write wrapper classes.
so could u suggest any other way around.
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Try creating a COM object that's calling classes from your dll's.
That way you can easily add a COM reference to your newly-created class and then use this one to access your legacy classes.
Regards,
mav
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In WinForms programming I made 3 Forms.
and the 3 forms have same menu but the menu load all forms each of menu item.
So I think I want to make it does not take more resource when hide a form and show another form.
So I made write down like this...
class Form1
public Form2 form2; Form3 from3;
Form1()
{
form2=new Form2();
form3=new Form3();
}
and like above in another form.
it makes a recursive function and resource take more and more, it can't show main screen. constructor has all resource, it is not I want.
then I copy some code that is using owner but It has some more and more resource when I open file and close file.
I can't use form1.Close it will shut down my program. then I can't get resource when I hide a form.
menu can bring any another form of my program and then hide or close using form.
I must implement it. but I'm a beginner. So I want kind explain.
thanks you for reading.
Image will remind us some feelings and if I can ask someone about a problem, that's not a bad life.
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hi,
The problem is the way you are programming. i am totally confused 
Tell me your real requirement. i can help you out.;)
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S r e e j i t h N a i r
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