Managed C++/CLI

Active Threads in a Process

4-Aug-08 7:02

These are just a few links to related reading...

Registry[^]
HKEY_CLASSES_ROOT Key[^]
SAMPLE: FileAsso.exe Demonstrates How to Use File Associations[^]
Launching Applications[^]

I didn't look up the COM stuff. Research!

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

gayatri.neelema1-Aug-08 23:13

gayatri.neelema

1-Aug-08 23:13

Hi,
I want to find the active threads running in a process.
I am using c++ and win32 API's.

Thanks,
Gayatri

Re: Active Threads in a Process

teejayem2-Aug-08 3:33

teejayem

2-Aug-08 3:33

If this isn't a Managed C++ question (using .NET) please direct your question to C++ Forum[^]. If you are using the managed libraries, you can use the System.Diagnostics.Process[^] class to get the Threads[^] that belong to that process.

Re: Active Threads in a Process

Mark Salsbery2-Aug-08 6:59

"no GUID has been associated with this object" when calling managed dll from native C++

2-Aug-08 6:59

You could use the WMI Win32_Process and Win32_Thread classes.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Benny Jaminé31-Jul-08 2:26

Benny Jaminé

31-Jul-08 2:26

I need to call a managed C++ dll from our native C++ code. To manage this i followed the tutorial in http://support.microsoft.com/kb/828736 "How to call a managed DLL from native Visual C++ code in Visual Studio.NET or in Visual Studio 2005."
However I'm using VS2008 and the article is using a managed C# dll.
Were the article says:

Replace the following lines of code in the AssemblyInfo.cs file

[assembly: ComVisible(false)]
[assembly: AssemblyDelaySign(false)]
[assembly: AssemblyKeyFile("")]

with the following.

[assembly: ComVisible(true)]
[assembly: AssemblyDelaySign(false)]
[assembly: AssemblyKeyFile("..\\..\\MyKeyFile.SNK")]

I added the SNK file to the projects property "linker->Advanced->Key File" and changed [assembly: ComVisible(false)] in the AssemblyInfo.cpp file.

Now when I build my solution I get following errors in the native code:
error C2787: 'WNXal::NeXus' : no GUID has been associated with this object
error C2079: 'pINeXus' uses undefined struct 'WNXal::INeXus'

Code snippit:
--------------

#import "../Lib/NeXus/References/WNXal.tlb" raw_interfaces_only 
using namespace WNXal; 
 
// Initialize COM. 
HRESULT hr = CoInitialize(NULL); 
 
// Create the interface pointer. 
INeXus pINeXus(__uuidof(WNXal::NeXus)); // ERROR  
 
long lResult = 0; 
 
// Call the Add method. 
e = pINeXus->Initialize();  // initialise is signature is virtual int WNXal::INeXus::Initialize(); 
                 
// Uninitialize COM. 
CoUninitialize();

Benny

Re: "no GUID has been associated with this object" when calling managed dll from native C++

led mike31-Jul-08 4:59

How to switch to Form Designer for inserted Form.h?

31-Jul-08 4:59

Stray Bullet wrote:
I need to call a managed C++ dll from our native C++ code.

Alternatively you can make a mixed mode project to solve that problem without the need to expose the managed classes using COM

[Native module] calls --> [Mixed Mode module] calls --> [Managed module]

no COM.

led mike

uusheikh30-Jul-08 22:06

uusheikh

30-Jul-08 22:06

I have designed a Winform Form, lets say Form1.h. I can switch to its Form designer and drop components etc. Now, if i insert this Form1.h in a different solution/project, i can compile, call the Form, but i cannot switch to the form designer. It's like a plain .h file. How can i make VS2008 understand that this is a form, so that i can edit it visually?

I'm using VS2008 C++/CLR.
Thanks

Re: How to switch to Form Designer for inserted Form.h?

Mark Salsbery31-Jul-08 7:23

Re: How to switch to Form Designer for inserted Form.h?

31-Jul-08 7:23

uus831 wrote:
Now, if i insert this Form1.h in a different solution/project, i can compile, call the Form, but i cannot switch to the form designer.

What if you copy and add the Form1.resx file to the new project as well?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

uusheikh31-Jul-08 15:25

uusheikh

31-Jul-08 15:25

Hi, i tried that too, but its just the same. I cant switch to form designer.

Re: How to switch to Form Designer for inserted Form.h?

dybs1-Aug-08 18:23

dybs

1-Aug-08 18:23

I ran into a similar problem not long ago (using VS2005 Pro). Here's how I solved it

1. In the project you want a copy of the Form1, simply add a new Form object. Be sure to call it Form1 was well (or whatever you called it in your original project).
2. Delete the .h and .cpp files for the form you just created. Leave the .resx file alone.
3. Copy Form1.h and Form1.cpp from your original project to your new project and compile. Be sure to rename them to whatever you called the form you just deleted. Since your copied form is now the same name, it should work just fine.

I'm not certain if this is exactly what I did, but I have it documented at work. I can check on it Monday.

Dybs

Re: How to switch to Form Designer for inserted Form.h?

uusheikh3-Aug-08 21:20

uusheikh

3-Aug-08 21:20

Thanks!!! It works! I have tried, and it works great. Except, that you need to rename the namespace so that it is the same in the new project.

Great tip!
Thanks again.

Re: How to switch to Form Designer for inserted Form.h?

dybs4-Aug-08 7:32

dybs

4-Aug-08 7:32

Oh yeah, kinda forgot the namespace thing Smile | :)

No problem, glad to help.

Dybs

Threading problem

MarkB77730-Jul-08 14:03

MarkB777

30-Jul-08 14:03

Hi,

I'm trying to call CreateThread() from windows.h using the below code:

The problem argument seems to be the emphasised one...

<br />
unsigned long i;<br />
<br />
CreateThread(NULL, 0, LiftThread, (void *)i, 0, &id);<br />

Im getting the error:

Error 5 error C2440: 'function' : cannot convert from 'unsigned long (__cdecl *)(void *)' to 'LPTHREAD_START_ROUTINE'

Does anyone know how I could fix this?

Cheers,

Mark Brock

Click here to view my blog

Re: Threading problem

Mark Salsbery30-Jul-08 14:33

30-Jul-08 14:33

Your thread procedure needs to be defined as follows:

DWORD WINAPI LiftThread(LPVOID lpParameter);

Is that how you defined it?

Also, non-C++/CLI questions should be posted on the Visual C++/MFC board Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Threading problem

MarkB77730-Jul-08 22:36

MarkB777

30-Jul-08 22:36

Hi Mark,

Ok i'll give that a try.

Mark Salsbery wrote:
DWORD WINAPI LiftThread(LPVOID lpParameter);

Tracing back the define statements I believe the function is defined like that, except there is no DWORD. I'll try it with the DWORD when I get home.

Mark Salsbery wrote>
Also, non-C++/CLI questions should be posted on the Visual C++/MFC board

Whoops, prolly should have searched MFC and CLI before posting :P.

Thanks,

Mark Brock

Click here to view my blog

Icon Display

mikobi29-Jul-08 23:43

mikobi

29-Jul-08 23:43

I am using Visual c++ NET 2005
In each forms I write down the path of Icon property.

When I load the program, the Icon appear on the left corner of Title bar but in left side of menu bar appears the default icon. I do no where to change this . I need that appears in menu bar a new icon instead of the default.

I need your help.

Re: Icon Display

Mark Salsbery30-Jul-08 6:20

Caps Lock Problem with DDX_ManagedControl

30-Jul-08 6:20

This isn't really a C++/CLI question.

Although you may get a solution here, you may want to try asking
this on the Windows Forms[^] board.

I'm not even sure what icon you're referring to Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

fredsparkle28-Jul-08 8:26

fredsparkle

28-Jul-08 8:26

We are doing interop between MFC and a custom C# dialog control with multiple sub controls that we are hosting in a CDialog with the DDX_MangedControl.

Everything works as expected until the user enters a TextBox Field with UseSystemPasswordChar=true, with the caps lock key turned on.

At which time it displays a ballon message informing the user that the caps lock key is on.

When the user turns the caps lock key off the whole control surface with the exception of the TextBox field it self disappears.

If you let the ballon tip expire normally then the portion of the tip that was under the ballon tip does repaint.

Any suggestions on how to fix this?

Thanks!

led mike28-Jul-08 8:39

28-Jul-08 8:39

What sort of things have you tried so far?

led mike

fredsparkle28-Jul-08 10:21

fredsparkle

28-Jul-08 10:21

Well after a bit of seaching I found a example of code that supresses the tooltip popup with EM_SHOWBALLOONTIP which I then adapted as a bute force solution that works with a horible blink of the entire control.

I did this by adding a timer to the base control and starting it from the text field to refresh the entire control.

    tb_password.Tag = (object)timer1;<br />
<br />
<br />
    public class PasswordControl : TextBox<br />
    {<br />
        private const int EM_HIDEBALLOONTIP = 0x1504;<br />
        protected override void WndProc(ref Message m)<br />
        {<br />
            if (m.Msg == EM_HIDEBALLOONTIP)<br />
            {<br />
                System.Windows.Forms.Timer timer =<br />
                    (System.Windows.Forms.Timer) this.Tag;<br />
                timer.Start();<br />
            }<br />
            base.WndProc(ref m);<br />
        }<br />
    }<br />
<br />
<br />
        private void timer1_Tick(object sender, EventArgs e)<br />
        {<br />
            timer1.Stop();<br />
            this.Refresh();<br />
        }

Does anyone have a better solution?

Thanks

led mike28-Jul-08 10:27

28-Jul-08 10:27

fredsparkle wrote:
Does anyone have a better solution?

Well I was going to suggest something until I saw you voted down my post.

led mike

Luc Pattyn28-Jul-08 10:37

Luc Pattyn

28-Jul-08 10:37

Yep, you are not the first victim of the modern voting system.

Best way to avoid this (or reduce its probability) is to modify
the message type away from "answer" when the only thing you (rightfully) do
is ask some questions, since those questions are strictly not an "helpful answer"
to the OP.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Fixturized forever. Confused | :confused:

led mike28-Jul-08 11:20

28-Jul-08 11:20

Luc Pattyn wrote:
Best way to avoid this (or reduce its probability) is to modify
the message type away from "answer" when the only thing you (rightfully) do
is ask some questions

Perhaps, but that doesn't stop the 'Bad Question' voting mechanism which just equates to a '1' correct?

Also, the default message type isn't "Answer" anyway, it's "General Comment".

led mike