Managed C++/CLI

Mark Salsbery12-Feb-08 8:09

Mark Salsbery

12-Feb-08 8:09

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

led mike12-Feb-08 9:31

12-Feb-08 9:31

I don't know, never done a pure assembly. Would that compile?

led mike

Mark Salsbery12-Feb-08 9:44

Mark Salsbery

12-Feb-08 9:44

I don't know if it would build or not.

The whole idea of "I made a library file using Pure clr option. The files in that project all are native c/c++"
makes me go WTF | :WTF:

, since, in addition to the quote you posted, there's also this quote (for /clr:pure):
"Produces an MSIL-only output file with no native executable code, although it can contain native types compiled to MSIL"

Regardless, the OP's linker errors may be unrelated to the /clr setting...or maybe not Smile | :)

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

led mike12-Feb-08 9:56

error C2371: 'IDataObject' : redefinition; different basic types

12-Feb-08 9:56

It’s amazing how many so called developers either don’t or can’t read documentation. I mean the state of documentation today compared to when I started out is incredible. I have a UDP thread in the C# forum where the OP was describing odd behavior and posted the sending code. I looked at it and said I had no experience with UDP but his code didn’t use SendTo and I would have expected it to just based on what I have read down through the years. So he replies with you can use Connect and Send with UDP and the thread goes back and forth a couple times until I have had enough.

So I go and build two apps, Sender/Client and code them the way I interpret the documentation and of course they just work, shocking, no really it is. Once I decided to do it the whole thing took like 20 minutes including getting snacks and drinks and chatting with folks. Meanwhile the C# thread spans 10s of hours.

So I finally just reply with, I said a ~~have~~ had no experience so I just did it and it behaves as expected, here’s the code. Sleepy | :zzz:

led mike

convert Message To MSG

javad_20058-Feb-08 1:13

javad_2005

8-Feb-08 1:13

Hello
how to Convert Message% From Manage C++ To MSG *
i want to get message in manage C++ but with MSG don't with Message

[SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
virtual void WndProc(Message% m ) override
{
////////////////////// I want To Send MSG * to Proc No Message%
Form::WndProc((Message%)m);
} //this is work but dont MSG *

s196675m7-Feb-08 7:15

s196675m

7-Feb-08 7:15

I was trying to link external library with my existing project. I got some error, where some of them are redefination and some of then are ambiguous symbol

error C2371: 'IDataObject' : redefinition; different basic type

The above error says, 'IDataObject' defines in more than one places. It might be true.
When I search MSDN I found IDataObject is declared in objidl.h and at the same time it is defined in System::Windows::Forms namespace.

I am using the VC++/ CLR project and I have windows form in my project.

The external library might be refering IDataObject from objidl.h. So compiler might find IDataObject in objidl.h and in System::Windows:Forms.

So, how I can avoid this definition problem.

Any idea, suggession or link will be helpful and appreciated.
Thank you.

Convertion funtions

lgatcodeproject6-Feb-08 22:55

lgatcodeproject

6-Feb-08 22:55

Hi friends,
Is there any function available in c++/VC++ to convert an hex value to int? let me know if yes.

Regards,

lgatcodeproject

Re: Convertion funtions

led mike7-Feb-08 4:31

Network connection status

7-Feb-08 4:31

lgatcodeproject wrote:
Is there any function available in c++/VC++ to convert an hex value to int? let me know if yes.

Perhaps you are looking for the C Runtime Library strtol(...) function. If you are this is the wrong forum as this forum is for C++ development using the .NET platform. For future C/C++ questions use the Visual C++ / MFC forum

led mike

Re: Convertion funtions

lgatcodeproject11-Feb-08 22:15

lgatcodeproject

11-Feb-08 22:15

okay!

lgatcodeproject

vijboy5-Feb-08 12:14

vijboy

5-Feb-08 12:14

I'm using System.Net.NetworkInformation.NetworkInterface to get the information about network connections to my PC. But this class seems to be 'Read only', i.e., I can view the information about network connection. For example System.Net.NetworkInformation.NetworkInterface.OperationalStatus tells us whether network connection is Up or Down. Is there any away that I can change that status programatically? i.e, can we enable/disable the network connection programatically?

Thanks
Ram

Multi threading

vijboy4-Feb-08 11:21

vijboy

4-Feb-08 11:21

Hi,

I've the following code that runs in a timer function every second. OnTimedEvent() is a timer delegate that is invoked by Windows timer every second. It uses MFC/Windows SDK. It sets the processor priority for the thread that is running this code.

void CPci1553::OnTimedEvent( Object^ source, ElapsedEventArgs^ e )
{
//set the timer thread affinity to second process and set it to higher priority
SYSTEM_INFO info;

//get the configuration information of computer
GetSystemInfo(&info);

//if the system has more than one processor, use the last processor for TOD thread
//set the thread affinity to second processor
if(info.dwNumberOfProcessors > 1)
SetThreadIdealProcessor(GetCurrentThread(),info.dwNumberOfProcessors-1);
}

I need to upgrage this code for .NET using C++/CLI. I tried to use .NET functions like "System::Environment::ProcessorCount" to processor count in on the system, "System.Diagnostics.ProcessThread.IdealProcessor" to set the processory priority for the thread, "System.Threading.Thread.CurrentThread" to get the current running thread for this code. But the problem is "System.Diagnostics.ProcessThread" is unmanaged thread and "System.Threading.Thread" is managed thread. I don't know how to mix these two. Pls. help me with this code.

Thanks
Ram

Re: Multi threading

Mark Salsbery4-Feb-08 12:06

Mark Salsbery

4-Feb-08 12:06

There isn't a one-to-one relationship between System.Threading.Threads
and System.Diagnostics.ProcessThreads.

A System.Diagnostics.ProcessThread is an actual OS thread.

A System.Threading.Thread is a logical thread. It's possible for many
System.Threading.Threads to be using the same OS thread.

You can manage affinity at either level, but doing it at the
System.Threading.Thread level doesn't mean it will have any effect whatsoever
on an OS thread, like your Win32 API code does.

Mark

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

Re: Multi threading

vijboy5-Feb-08 13:29

vijboy

5-Feb-08 13:29

OK. If I want to go with OS thread using System.Diagnostics.ProcessThread class, I can use System::Diagnostics::ProcessThread::IdealProcessor to set the processory affinity. But, how do I access the current running thread like we get with GetCurrentThread()in WIN32?

Another application running in the form

rover_boy4-Feb-08 10:19

rover_boy

4-Feb-08 10:19

Hi I'm creating an application in Windows forms. I wondering if any knows how a System::Diagnostics::Process::Start("C:\\path\\my.exe"); which opens an application in a window to place that window in my form?

Re: Another application running in the form

TJoe5-Feb-08 6:05

TJoe

5-Feb-08 6:05

This[^] is in C#, but it should help.

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

Converting and .exe to a Form Control

TheBerk4-Feb-08 6:54

TheBerk

4-Feb-08 6:54

Hi, this is probably an absurd question, but I'm really new to working in C++/CLI, so please bare with me. I have a solution that compiles into an application (.exe). I was wondering if it was at all possible to convert the project into Custom Windows Form control, so that I can place it in a Wondows form. The application is Scite, btw. Or if anyone knows how to get a Scintilla based text editor to be a Forms Control, that would also help.

Thank you!

Re: Converting and .exe to a Form Control

TJoe5-Feb-08 6:28

TJoe

5-Feb-08 6:28

Check this[^] out.

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

Add/Remove items in a listBox

newkid31-Jan-08 4:16

newkid

31-Jan-08 4:16

Hi, i'm using windows forms and I was wondering how to add to a listBox from a comboBox. Also how to remove an item from the listBox.

<br />
private: System::Void btnConfirmCommand_Click(System::Object^  sender, System::EventArgs^  e) {<br />
<br />
this->cmbCommands->Select();<br />
this->lstCommands->Items->Add(cmbCommands);<br />
<br />
}<br />
<br />
<br />
private: System::Void btnRemoveCommand_Click(System::Object^  sender, System::EventArgs^  e) {<br />
<br />
this->lstCommands->Select();<br />
this->lstCommands->Items->Remove(lstCommands);<br />
<br />
}<br />

modified on Thursday, January 31, 2008 10:27:48 AM

led mike31-Jan-08 4:59

31-Jan-08 4:59

newkid wrote:
this->lstCommands->Items->Add(cmbCommands);

You need to pass in the actual string you want to add not the ComboBox control.

led mike

newkid31-Jan-08 5:13

newkid

31-Jan-08 5:13

so i create a string say x, how do you set an item in the comboBox to x?

<br />
string x;<br />
<br />
this->cmbCommands->Select();<br />
cmbCommands->SelectedItem;<br />
<br />
this->lstCommands->Items->Add("x");<br />
<br />

led mike31-Jan-08 5:44

31-Jan-08 5:44

Are you in school or leaning by working from a book or what? If you are using a book to start out I think you might need a different book, or you may have skipped some stuff or something. This is very very beginner level stuff and you are already on to list boxes and combo boxes without knowing it. That's probably not a good idea.

led mike

rover_boy1-Feb-08 3:57

rover_boy

1-Feb-08 3:57

This should solve your problem.

<br />
//To Add<br />
<br />
if(cmbCommands->Text->Length > 0)<br />
{<br />
   lstCommands->Items->Add(cmbCommands->Text);<br />
<br />
}<br />
<br />
//To remove<br />
if(lstCommands->SelectedIndex !=-1)<br />
{<br />
  lstCommands->Items->RemoveAt(lstCommands->SelectedIndex);<br />
}<br />

led mike1-Feb-08 4:19

1-Feb-08 4:19

rover_boy wrote:
This should solve your problem.

Really? It will solve this?

newkid wrote:
so i create a string say x, how do you set an item in the comboBox to x?

string x;
this->lstCommands->Items->Add("x");

I think not.

led mike