Re: Accessing the shell - C# Discussion Boards

Are ownerdrawn buttons available?

7-Mar-02 6:06

JerzyPeter wrote:
I'm scared to write to you again but belive me it still doesn't work for me.

Nah don't be scared, I don't bite Smile | :)

I'm curious as to why it isn't working for you when I have no problems doing it.

JerzyPeter wrote:
My Microsoft .NET framework is 1.0 ver. 1.0.3705, Development Environment 2002 ver. 7.0.9466

Same versions I'm showing. Did your box have another version of .NET on it before (one of the betas or an RC)? I repaved this one about 2 weeks ago. Funky things happen when you mix a pre 1.0 beta with the final Big Grin | :-D

JerzyPeter wrote:
Btw: I found another way of subclassing (but still only in your project): you can 'Add New Item' and choose Inherited Control and select base ExtendedUserControl for example.

Yeah, I forgot about that one. I was thinking it was only there for forms. Smile | :)

James

Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978

4-Mar-02 3:53

Hi all,

I was wondering if there is some way to implement ownerdraw buttons in C#.
I've searched around but didn't find anithing.

Any idea?

Thanks in advance and Kind Regards

Severino
Confused | :confused:

Re: Are ownerdrawn buttons available?

James T. Johnson4-Mar-02 14:23

4-Mar-02 14:23

This should give you a base to start from.

using System;
using System.Windows.Forms;

namespace Namespace {
  public class MyButton : Button {
    public MyButton() : base() {
      SetStyle( ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true );
    }

    protected override void OnPaint(PaintEventArgs e) {
      // Draw the button
    }
  }
}

HTH,

James

Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978

Accessing the shell

4-Mar-02 1:51

Is there any way to access the shell in C# ?
I want to list the contents of the desktop....
Thanks! Confused | :confused:

James T. Johnson4-Mar-02 14:30

4-Mar-02 14:30

Well this isn't done via the shell but you can get this list by doing this.

public string [] GetFilesOnDesktop() {
  string desktop = System.Environment.GetFolderPath( System.Environment.SpecialFolder.DesktopDirectory );
  return System.IO.Directory.GetFiles(desktop);
}

I'm not familiar with the Shell API but you should be able to also use PInvoke to call the functions you would normally.

HTH,

James

Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978

4-Mar-02 21:19

Thanks for the answer! I did try that, but the idea is to create a little explorer-like application in C#, with a tree listing of all contents of the desktop (the virtual directory, not the physical!).

So the question was in fact: how do I access virtual folders like desktop, my computer, my documents,...

James T. Johnson4-Mar-02 22:13

4-Mar-02 22:13

Anonymous wrote:
So the question was in fact: how do I access virtual folders like desktop, my computer, my documents,...

OK, I believe the shell functions are nothing more than a COM object, so you can use the COM object via PInvoke.

Unfortunately I can't give you any more than that, PInvoke and Shell programming are both something I haven't delved into much (PInvoke) or at all (Shell programming).

I can however point you to a place that might have already answered or question, or if it hasn't been answered you can ask it there. The DOTNET mailing list is probably the best mailing list out there dealing with .NET.

Hope I pointed you in the right direction,

James

Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978

5-Mar-02 1:37

Thanks, great link!
However, something else.. using COM-objects, is that good programming practice...? I mean, this way you put some Windows-only code into the application, or am I wrong...?

James T. Johnson5-Mar-02 8:21

5-Mar-02 8:21

Anonymous wrote:
I mean, this way you put some Windows-only code into the application, or am I wrong...?

Correct, but you'll have to use different methods for getting a list of files on the desktop for each operating system anyway. If you place all your OS specific stuff in a separate assembly then you can load the proper assembly at runtime.

FWIW I'm not sure how much of Windows.Forms is going to be ported; it isn't a part of the CLI specs but I believe the Mono project is going to port some of it over anyway.

James

Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978

5-Mar-02 20:57

Okay, now I understand. Depending on the operating system, you still have to write different code.
Thank you very much for your remarks!
Kind Regards,
Ludwig

C# question

Jon Newman4-Mar-02 1:05

Jon Newman

4-Mar-02 1:05

What new system files are required to use C# apps on Win95 Win98 WinMe etc... or do they run normally using only the ordinary system files.
Basically is it worth using C# if it needs loads of extra libraries that have to be included in the installer

.NET or not .NET? MFC is the question......

Michael P Butler4-Mar-02 1:25

Michael P Butler

4-Mar-02 1:25

The .NET Framework needs to be installed, about a 19mb download.

I don't think Win95 is supported as a .NET platform.

Michael Smile | :)

Jon Newman4-Mar-02 1:32

Jon Newman

4-Mar-02 1:32

19meg!!! Does XP have this already? Is it in the Service packs for Win2K? Is it really worth moving to C#. Is it free to distribute on CD with a C# app?

.NET or not .NET? MFC is the question......

Michael P Butler4-Mar-02 1:42

Michael P Butler

4-Mar-02 1:42

XP doesn't have it yet.
The last service pack for Win2k doesn't have it.

I don't know of any Microsoft applications or products that distribute it yet - apart from Visual Studio.

I would expect to see it in a service pack soon and probably in the next version of IE.

Michael Smile | :)