vb.net class - .NET (Core and Framework) Discussion Boards

new_phoenix11-Jun-08 3:57

11-Jun-08 3:57

Could somebody please point me to a tutorial on how to create a Help system similar to Microsoft application? I know it could be done with .HLP or .CHM type files, or even in HTML. What is the preferred approach and how is it done in the the C# part of Visual Studio?

Re: Creating a Help system...

John Ad11-Jun-08 4:29

John Ad

11-Jun-08 4:29

Hi,

I assume you are looking for the procedure to call the help file from your application. If this is the said scenario, then I have created a sample project that you may download from:

http://www.speedyshare.com/234286855.html[^]

If you are looking to create a help file ( a Help System), then refer to the below mentioned link:

http://helpcentral.componentone.com/nethelp/d2h/[^]

I hope this would be helpful.

Vinay
ComponentOne LLC.
www.componentone.com

Re: Creating a Help system...

Thomas Stockwell18-Jun-08 16:22

Thomas Stockwell

18-Jun-08 16:22

If you want a free program for creating chm files you can use Microsoft's HTML Workshop. Keep in mind that it is free for a reason Smile | :)

Regards,
Thomas Stockwell

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What is OLE Automation?

Vanitha Sivakumar11-Jun-08 1:58

Vanitha Sivakumar

11-Jun-08 1:58

Hi,
Can any one tell me about what is OLE Automation?

Thanks,
Vanitha

Re: What is OLE Automation?

Vasudevan Deepak Kumar11-Jun-08 2:05

Vasudevan Deepak Kumar

11-Jun-08 2:05

Start here: http://en.wikipedia.org/wiki/OLE_Automation[^]

Vasudevan Deepak Kumar
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How to determine ms word document version in c#

csharpguy769-Jun-08 17:35

csharpguy76

9-Jun-08 17:35

Hi

I am trying to read a file and determine if the file is a word document, and retrieve its version number too.

Please help.

Thanks
Dave.

Re: How to determine ms word document version in c#

Vasudevan Deepak Kumar11-Jun-08 0:56

Vasudevan Deepak Kumar

11-Jun-08 0:56

This snippet would read a Word Document with C# www.c-sharpcorner.com/Code/2002/Mar/WordFromDotNet.asp[^]. You can try out this and see if there are properties en route, which help you to determine the version.

vb.net class

sanraj77-Jun-08 20:29

sanraj7

7-Jun-08 20:29

i am a new user in vb.net. Can anyone tell me how does GET AND SET works in class.
thanks

Re: vb.net class

Colin Angus Mackay7-Jun-08 23:41

Colin Angus Mackay

7-Jun-08 23:41

They are syntactic sugar for methods with a well define semantic meaning. If you want to see how they work I suggest you look at an assembly with ILDASM to see what is generated. If that isn't what you mean then you might want to ask a more detailed (less vague) question.

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Re: vb.net class

Christian Graus9-Jun-08 17:27

Christian Graus

9-Jun-08 17:27

I think you need to buy a book.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: vb.net class

John Ad11-Jun-08 3:37

John Ad

11-Jun-08 3:37

Hi,

The Set Statement is for setting values for your properties. The Get Statement is for returning values from your properties. For more information, please refer to the below mentioned links:

http://www.ondotnet.com/pub/a/dotnet/2003/05/20/introvbnetoo.html

http://www.homeandlearn.co.uk/net/nets11p5.html

http://www.vbdotnetheaven.com/Uploadfile/rajeshvs/PropertiesInVbDotNet04192005060237AM/PropertiesInVbDotNet.aspx

http://www.xtremevbtalk.com/showthread.php?p=688701

http://www.vbdotnetheaven.com/UploadFile/rsharma/PropertiesInVbDotNet04202005074631AM/PropertiesInVbDotNet.aspx

I hope this would be helpful.

Vinay
ComponentOne LLC.
www.componentone.com

Win32 API usage from C# code not working on deployment environment

impeham7-Jun-08 1:31

impeham

7-Jun-08 1:31

I am using VS 2008 to develop a Web service that uses few windows API functions in the server side:
[DllImport("User32.dll")]
public static extern Int32 FindWindow(String lpClassName, String lpWindowName);
[DllImport("User32.dll")]
public static extern Int32 SetForegroundWindow(int hWnd);
[DllImport("User32.dll")]
public static extern Int32 GetForegroundWindow();

In the development environment all is working well.
I deployed the web service to another machine with same OS (windows XP SP2) and same .net frameworks installed (no development environment there - Installed 1.1, 2.0, 3.0 and 3.5) and these functions are not working (I used logs to watch their operation separately and they are simply not doing anything). I assume therefore that there is a general problem invoking Win32 API on that machine for some reason.
Any ideas how to fix this?

Re: Win32 API usage from C# code not working on deployment environment

Christian Graus7-Jun-08 6:04

Christian Graus

7-Jun-08 6:04

Those calls are pretty old, it seems odd to me that they may not be there. Does nothing happen when you call them ?

Re: Win32 API usage from C# code not working on deployment environment

impeham7-Jun-08 6:45

impeham

7-Jun-08 6:45

Like i described - nothing happens (in deplyment environment) - these functions are called but doesn't do the operation they need to.
of course they are there (in the DLLs), but somehow the framework don't really get them...

Re: Win32 API usage from C# code not working on deployment environment [modified]

impeham7-Jun-08 13:34

impeham

7-Jun-08 13:34

I made some progress with this:
I created an EXE application and Tested FindWindow exactly as it is used from my web service (same call, same parameters, etc.). it works fine (finds the window's handle).

I tried changing the user for iis from ASPNET to administrator in the machine.config to see if permissions is the problem ( verified user with process explorer), but even with administrator it is not working...

Any ideas?

Thanks.

modified on Saturday, June 7, 2008 7:56 PM

How can I Develope Telephony Applicatino/Auto Dialer

Suresh Suthar6-Jun-08 23:41

Suresh Suthar

6-Jun-08 23:41

Hi all,

Can someone help me how to develop teleyphony application and make a auto dialer application using modem or EPABX or something else.

Thanks in Advance.

Be an Eagle, Sky is Yours.

Re: How can I Develope Telephony Applicatino/Auto Dialer

Christian Graus7-Jun-08 6:04

Christian Graus

7-Jun-08 6:04

TAPI is what you need, I believe.

Re: How can I Develope Telephony Applicatino/Auto Dialer

Suresh Suthar7-Jun-08 6:07

Suresh Suthar

7-Jun-08 6:07

Thanks a lot Christian. Smile | :)

I know that TAPI is the solution. But is there any sample code or some articles on that so can I develop telephony application on VB.Net. Blush | :O

Be an Eagle, Sky is Yours.

New Thread vs BeginInvoke vs BackgroundWorker

supercat96-Jun-08 13:55

supercat9

6-Jun-08 13:55

A task which uses BeginInvoke is supposed to use EndInvoke to clean up; fire-and-forget semantics are explicitly discouraged. If one wants to launch a fire-and-forget thread, what disadvantage is there to simply saying:

Dim Th as New Thread(me.ThreadProc)
Th.IsBackground = True
Th.Start

as a means of running ThreadProc asynchronously? If Th exits, is some cleanup required, or will it get garbage-collected if no reference to it exists?

Re: New Thread vs BeginInvoke vs BackgroundWorker

Rob Smiley8-Jun-08 3:28

Rob Smiley

8-Jun-08 3:28

This code is fine for running an async operation. .NET takes care of all the complicated stuff, so you don't need to do any explicit cleanup, the thread will finish and cleanup automatically when ThreadProc method exits.

The only thing to look out for is marshalling to the main thread if you want to update / read any ui elements, e.g. setting .Text property on a label control from within ThreadProc. In this case, you must do something like:

Private Delegate Sub UpdateLabelTextDelegate(ByVal value As String)

Private Sub UpdateLabelText(ByVal value As String)
    If Label1.InvokeRequired Then
        Label1.BeginInvoke(New UpdateLabelTextDelegate(AddressOf UpdateLabelText), New Object() {value})

    Else
        Label1.Text = value

    End If

End Sub

Also, the following can be used as a shortcut to read the label text (only in VS2008 though):

Dim value As String = If(Label1.InvokeRequired, CStr(Label1.Invoke(Function() Label1.Text)), Label1.Text)

Rob

"An eye for an eye only ends up making the whole world blind"

Re: New Thread vs BeginInvoke vs BackgroundWorker

supercat98-Jun-08 15:50

supercat9

8-Jun-08 15:50

Won't "BeginInvoke" create a leak if there's no "EndInvoke"?

Re: New Thread vs BeginInvoke vs BackgroundWorker

Rob Smiley9-Jun-08 4:19

Rob Smiley

9-Jun-08 4:19

I've been doing it this way for years! maybe i've been getting it wrong! will re-read msdn later...

"An eye for an eye only ends up making the whole world blind"

Mixing Java and .Net

#realJSOP6-Jun-08 9:41

#realJSOP

6-Jun-08 9:41

I have a .Net DLL. Can I use it from a Java program (assuming .Net is installed of course).

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
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Re: Mixing Java and .Net

Pete O'Hanlon6-Jun-08 9:53