microsoft.public.dotnet.languages.csharp Google Group

Re: Find object's method and

2012-05-24T19:10:36Z

You may find these links useful:

[link]
[link]
[link]

Re: C# - Dll questions

2012-05-24T19:08:38Z

"Not working neighther" is not a useful problem description (never mind
good grammar).

If you want help, you need to get into the habit of asking good questions.

Re: Find object's method and

2012-05-24T16:53:40Z

Ehm...
I think you are really confusing things. A managed class type *never*
has a window handle (hwnd) and vice versa.
Are you talking about a *window* class? If yes, then you will not be
able to use reflections. Window classes respond to window messages in a
certain way. But you cannot examine this behavior by reflection. All you

Re: C# - Dll questions

2012-05-24T16:10:54Z

- Do no reinvent the wheel, use .NET API so you have less code to debug.

- You can call .NET API MessageBox.Show since easily [link]

- If you port your code to other OS (other versions o windows, smart devices, linux) you won't need to change your code to make it work again.

Re: C# - Dll questions

2012-05-24T15:30:02Z

For [link]
(In the same site, and many samples around the internet -
[link]
the namespace is System.Windows.Forms (the only "s" for different) - Not
working neighther).

Re: Find object's method and

2012-05-24T15:23:05Z

Ok.
The code look like :
...
[DllImport("user32.dll", EntryPoint = "MessageBoxA")]
static extern int MsgBox(int hWnd,
string msg,
string caption,
int type);
...
public static bool WindowEnumProc(IntPtr hwnd, int lParam)

Re: C# - Dll questions

2012-05-24T14:51:34Z

Since "System.Windows.Form" is not what any of us wrote, I'm not all that
worried about it.

You should become familiar with [link] and especially
[link]

There is a wealth of useful information and documentation there, including
detailed reference of the C# language and the .NET Framework libraries.

Re: Find object's method and

2012-05-24T14:34:53Z

Sorry h is RuntimeTypeHandle
Anyway - conversion is needed.
Thanks :)

I found:
Type.GetTypeFromHandle(h)
h should be hwnd, but what if I need to convert it from IntPtr - How can I
convert IntPtr to hwnd type?

Thanks :)

I have only the handle+name (there is application outside C#, and I have

Re: C# - Dll questions

2012-05-24T14:33:42Z

System.Windows.Form is not acceptable (it isn't compiled - The computer
doesn't know this - Framework 3.5).

That's a stupid way to display a message box from managed code.

You're welcome.

Re: C# - Dll questions

2012-05-24T14:30:49Z

That's a stupid way to display a message box from managed code.

You're welcome.

Re: Find object's method and

2012-05-24T14:30:48Z

I found:
Type.GetTypeFromHandle(h)
h should be hwnd, but what if I need to convert it from IntPtr - How can I
convert IntPtr to hwnd type?

Thanks :)

I have only the handle+name (there is application outside C#, and I have
only the handle of the class).

Did you forget the namespace?

Re: Windows API function: getClassInfo()

2012-05-24T14:28:58Z

You were already directed to the pinvoke.net web site. Please look there.

If and when you have an actual code example in which you've used the
information you've learned there, and it still doesn't work, then post a
proper concise-but-complete code example that reliably reproduces the
problem, along with an _exact_ description of whatever error messages you

Re: Find object's method and

2012-05-24T14:26:40Z

Please post a concise-but-complete code example that reliably reproduces
the problem.

Fact is, the phrase "handle of the class" makes no sense, and "there is
application outside C#" doesn't really add much either. Unless you show
_exactly_ what you are doing, and also describe _exactly_ whatever error

Re: C# - Dll questions

2012-05-24T14:23:33Z

The application is class library,
so I put on code :
[DllImport("user32.dll", EntryPoint = "MessageBoxA")]
static extern int MsgBox(int hWnd,
string msg,
string caption,
int type);

and use MsgBox fine.

Thanks, anyway :)

Re: C# - Dll questions

2012-05-24T14:21:08Z

To use any member of any type, you must:

-- reference the assembly that declares the type, and
-- use the correct name in your code when using the type

If a type exists within a namespace, as most do (including MessageBox), you
must either provide the fully-qualified name (i.e. the full name, including