Managed C++/CLI

J_E_D_I7-Dec-08 19:21

7-Dec-08 19:21

Luc, you are absolutely right! I've changed the order of the include directives and it works like a breeze.
Thank you so much for this, I admit I would have never thought about it.
Smile | :)

Re: Creating Registry Key Values in C++/CLI environment

Luc Pattyn7-Dec-08 23:06

Luc Pattyn

7-Dec-08 23:06

You're welcome.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Fixturized forever. Confused | :confused:

J_E_D_I13-Dec-08 7:56

Re: Creating Registry Key Values in C++/CLI environment

13-Dec-08 7:56

Hi again Luc, I was wondering if you had any hint on how to solve this problem which is somehow linked to the previous one. I need to save the value obtained with the previous code (which is a DWORD: DesiredValue) in a registry key and this was the syntax I was using (successfully) in console environment.

DWORD DesiredValue;

// Creates Desired Registry Key 
	HKEY Xtmpkey;
	DWORD dwDisp = 0;
	LPDWORD xlpdwDisposition = &dwDisp;
	DWORD dwVal = DesiredValue; 
	// Desired Path for the Registry Key 
	RegCreateKeyEx(HKEY_CURRENT_USER, L"SOFTWARE\\MyPath", 0L,NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &Xtmpkey,xlpdwDisposition);

// Creates Desired Value
RegSetValueEx (Xtmpkey, L"Desired_Value_Name", 0L, REG_DWORD,(CONST BYTE*) &dwVal, sizeof(DWORD));

Now that I am porting the software into C++/CLI environment it returns the following errors:

Error 1 error LNK2001: unresolved external symbol "extern "C" long __stdcall RegCreateKeyExW(struct HKEY__ *,wchar_t const *,unsigned long,wchar_t *,unsigned long,unsigned long,struct _SECURITY_ATTRIBUTES * const,struct HKEY__ * *,unsigned long *)" (?RegCreateKeyExW@@$$J236YGJPAUHKEY__@@PB_WKPA_WKKQAU_SECURITY_ATTRIBUTES@@PAPAU1@PAK@Z)

Error 2 error LNK2001: unresolved external symbol "extern "C" long __stdcall RegSetValueExW(struct HKEY__ *,wchar_t const *,unsigned long,unsigned long,unsigned char const *,unsigned long)" (?RegSetValueExW@@$$J224YGJPAUHKEY__@@PB_WKKPBEK@Z)

Error 3 fatal error LNK1120: 2 unresolved externals

What am I doing wrong?

I thank you in advance.

Luc Pattyn13-Dec-08 8:26

Luc Pattyn

13-Dec-08 8:26

Hi,

there are two ways to solve this:

1.
most registry operations are supported in .NET by the Registry class
things not supported include special key types (not REG_SZ)

2.
when the Registry class does not offer what you need, you have to call the native functions (such as RegCreateKeyEx).

I don't know the details for C++, but you somehow must tell it where the library functions can be found,
and how they should be called.

This article[^] probably contains all you need and more.

FYI: in C# there is only one way to access native code, that is thru P/Invoke.

Remark: you would better have started a new thread for a question that hardly is connected to an old topic... that would have improved your chances for someone else to pick it up.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Fixturized forever. Confused | :confused:

Mark Salsbery7-Dec-08 6:12

7-Dec-08 6:12

As Luc mentioned, the order of the #includes can be a factor.

Another recent post asked about tchar.h and I tested it - it can be
used all by itself and it pulls in any additional header files it needs,
so I wouldn't think that's an issue here..

In your stdafx.h file, you may be missing the Windows versioning macros.
The macros have changed a bit in recent SDK versions, but if you create a dummy
project (MFC or Win32) you can look at the stdafx.h file and see the defaults.
For example, here's a stdafx.h file from one of my projects, using the latest SDK
on VS 2008:

// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently,
// but are changed infrequently

#pragma once


#define WIN32_LEAN_AND_MEAN

#include "<code>targetver.h</code>"

#include <stdio.h>
#include <tchar.h>

#ifndef VC_EXTRALEAN
#define VC_EXTRALEAN
#endif

// Windows Header Files:
#include <windows.h>

// <code>targetver.h</code>


#pragma once


#ifndef NTDDI_VERSION
#define NTDDI_VERSION NTDDI_WINXPSP2
#endif


#ifndef WINVER
#define WINVER _WIN32_WINNT_WINXP
#endif

#ifndef _WIN32_WINNT
#define _WIN32_WINNT _WIN32_WINNT_WINXP
#endif

#ifndef _WIN32_WINDOWS
#define _WIN32_WINDOWS 0x0410
#endif

#ifndef _WIN32_IE
#define _WIN32_IE 0x0600
#endif

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

J_E_D_I7-Dec-08 19:24

7-Dec-08 19:24

Hi Mark, thanks for this detailed suggestion. Luc's advice however solved the problem easily and for the time being I'll stick with it. I'll definitely look into your solution if a similar problem happens in the future. Cheers Big Grin | :-D

Unmanged library printing to debug and then killing application

adi099016-Apr-11 0:27

adi0990

16-Apr-11 0:27

Use #include "atlstr.h" or #include "afx.h" header file.

coder2555-Dec-08 18:59

coder255

5-Dec-08 18:59

I am using an unmanaged library made by Valve in a wrapper.

When this line of code executes:

if ( fileSystem->Init() != INIT_OK ) throw gcnew Exception(fileSystemDllName + " IFileSystem::Init failed.");

No exception is thrown. Instead the function prints this message to the debug output:

SteamStartup() failed: SteamStartup(0xf,0x06C9EAA0) failed with error 1: failed to take master pipe connection lock

Immediately after, the main thread exits. I KNOW why this is happening and I know how to fix it. That is not my question. What I need to know is how I can get my wrapper DLL to trap debug output, and at least put up a message box repeating the error, such as the one above.

I made a new class - .h and .cpp combined for brevity:

ref class SteamDebugListener : public System::Diagnostics::TraceListener
{
public:
    SteamDebugListener(void)
    {
    }

    virtual void Write(String^ Message) override
    {
        if (message-&gt;Contains("Steam") &amp;&amp; message-&gt;Contains("error"))
        {
            MessageBox::Show(message-&gt;Trim());
        }
    }

    virtual void WriteLine(String^ Message) override
    {
        if (message-&gt;Contains("Steam") &amp;&amp; message-&gt;Contains("error"))
        {
            MessageBox::Show(message-&gt;Trim());
        }
    }
};

And added this:

SteamDebugListener^ errorCatch = gcnew SteamDebugListener();
System::Diagnostics::Debug::Listeners->Add(errorCatch);
System::Diagnostics::Trace::Listeners->Add(errorCatch);

before the failing call, and set a breakpoint in the Write function, but it is not being called. What is the correct way to do all this?

i need client to server chat

Member 39837645-Dec-08 6:35

Member 3983764

5-Dec-08 6:35

hi all

i need to mae a client to server chat .. just like the ivoclize
https://www.ivocalize.com/[^]

this project .. well be baseb on web admin control panels ... and the the web admin will e able to creat , edit , delete rooms and users

the client contains text chat , voice chat , white board , web browser , and power point presentation

this is the room image

any one can help me to creat this ... ? and what it willcoast me ?
http://photos4.hi5.com/0068/804/671/w8Zjnx804671-02.jpg[^]

Re: i need client to server chat

Richard Andrew x6413-Dec-08 10:36

Richard Andrew x64

13-Dec-08 10:36

Member 3983764 wrote:
any one can help me to creat this ... ? and what it willcoast me ?

I can help you for US $75 per hour.

Fatal error C1902

Manfr3d3-Dec-08 12:51

Manfr3d

3-Dec-08 12:51

Hello guys,

I've a big problem with VC++2008. Till now it was working fine, than I created a new project tried to compile it and I get the error message:
fatal error c1902: error in program database manager. check installation.

I didn't change anything within my IDE I just tried to compile a project.
I already tried to reinstall the IDE but this didn't help, I still get this error.
I'll try de-installing VC++2008 and deleting all components, maybe than a reinstallation will work.
At the same time I got this problem with my VC++2005. Same error but I tried to recompile an old project when it occured.
However, my VS2003.NET is still working fine. But I need VC++2008 for a special project.

Does anyone have an idea about this?

Thanks and best wishes,
Manfred

Re: Fatal error C1902

Manfr3d4-Dec-08 11:32

Manfr3d

4-Dec-08 11:32

According to MS and several forums you have to place a file called mspdb80.dll in \WINDOWS\system32\ if this error occurs. I already added this file becuase I needed it in another project. However, there was another version of this file too called mspdb60.dll. I deleted the 80-version and my IDE workes again. Smile | :)

Infragistics ultraGrid

mikobi3-Dec-08 2:44

mikobi

3-Dec-08 2:44

When I put ultraGrid on my form and I compile the program I have an error:

UltraGrid is not member of Infragistics::Win

And when I Write namespace Infragistics::Win::UltraWinGrid, I have the same error on this line.

What to do so to use Infragistics components in Visual C++ NET 2005

Destroying controls created by CWinFormControl

astibich230-Nov-08 11:43

astibich2

30-Nov-08 11:43

I'm using CWinFormControl to create instances of .Net UserControls.

CWinFormsControl<myproject::mycontrol xmlns:myproject="#unknown"> m_control;
m_control.CreateManagedControl( WS_CHILD | WS_VISIBLE, rect, this, IDC_HOSTCONTROL );

This works fine. The problem occurs when I try to destroy the control. I need a deterministic call to the 'MyControl' finalizer, so I wrote the following:

m_control.DestroyWindow();
System::GC::Collect();

This code does not cause the Finalize\Dispose code to be called on 'MyControl'. In fact, 'MyControl' sticks around in memory until the MFC app closes. What am I doing wrong here?

Thanks,

Aaron

Re: Destroying controls created by CWinFormControl

led mike1-Dec-08 5:17

led mike

1-Dec-08 5:17

astibich2 wrote:
I need a deterministic call to the 'MyControl' finalizer

Then why are you using a Garbage Collection system? Ever heard of the word "Contradiction"?

led mike

space in a string !

sajjy30-Nov-08 10:19

sajjy

30-Nov-08 10:19

Hi yesterday I was trying to build a program but i had a problem ...!
the problem was that when I put space (" ") in the string, it finishes the string aoutomatically , so what canI do to fix the problem?

notice that i cant use a array of characters in that solution Wink | ;)

Mark Salsbery30-Nov-08 14:31

30-Nov-08 14:31

sajjy wrote:
the problem was that when I put space (" ") in the string, it finishes the string aoutomatically

How? Some sample code would help! Smile | :)

Mark

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

led mike2-Dec-08 4:31

led mike

2-Dec-08 4:31

Mark Salsbery wrote:
How?

Probably using the space in his head. Smile | :)

led mike

Mark Salsbery2-Dec-08 6:16

2-Dec-08 6:16

Space....the final frontier....

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

led mike2-Dec-08 6:49

led mike

2-Dec-08 6:49

Mark Salsbery wrote:
Space....the final frontier

We kunt do it kaptin, we just dunt have the power!

led mike

Paul Conrad2-Dec-08 6:57

Paul Conrad

2-Dec-08 6:57

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

TextBox: Conversion from String to Double

Paul Conrad30-Nov-08 18:00

Paul Conrad

30-Nov-08 18:00

sajjy wrote:
the problem was that when I put space (" ") in the string, it finishes the string aoutomatically

Huh? As Mark suggested, please provide a snippet of the code that is causing this problem.

J_E_D_I25-Nov-08 9:31

Re: TextBox: Conversion from String to Double

25-Nov-08 9:31

Hi, I am new to CLI-Windows Forms programming and I need to perform this simple task:

1) Allow the user to enter a value in a Text Box (textBox1)
2) Assign such value to a variable of type double (variable1)
[I am having difficulties casting the string to double]
3) Perform computations on that variable
[I should be able to do this once it's a double]
4) Display the resulting value in another Text Box (textBox2)

Can someone be so kind to help me with the correct syntax I should use for each step?
Many thanks.

Mark Salsbery25-Nov-08 11:51

Re: TextBox: Conversion from String to Double

25-Nov-08 11:51

For step 2:

Double.Parse Method[^]
Double.TryParse Method[^]

For step 4:

Double.ToString Method[^]

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

J_E_D_I26-Nov-08 2:00