C / C++ / MFC Discussion Boards

Re: A link problem with c++ template function

Stefan_Lang27-Jul-11 3:29

27-Jul-11 3:29

If you want to use a function from different cpp files you have to make the declaration (the function signature) available to both. In the case of a template function, the same goes for its definition! To avoid code duplication, the right place to put this is a header file, not a cpp file.

// file dump.hpp
template< size_t N >
void	cdecl _DumpWin32StructFields( WCHAR (&szBuffer)[N], LPCWSTR pszFormat, ... )
{
	va_list	pFirstParam ;
	va_start( pFirstParam, pszFormat ) ;
	StringCchVPrintf( szBuffer, N,pszFormat, pFirstParam ) ;
	va_end( pFirstParam ) ;
}

// file foo.cpp
#include "dump.hpp"
void foo() {
   WCHAR buffer[20];
   _DumpWin32StructFields(buffer, _T("Hello World!"));
}

// file bar.cpp
#include "dump.hpp"
void bar() {
   WCHAR buffer[30];
   _DunpWin32StructFields(buffer, _T("Goodbye Cruel World!"));
}

This will force the compiler to instantiate and create code for your template function for both foo.obj and bar.obj, and the linker won't have trouble finding them.

Can both VS2005 and 2008 be installed on XP

Cold_Fearing_Bird25-Jul-11 3:51

Cold_Fearing_Bird

25-Jul-11 3:51

Because of some reasons I have to use both VS2005 and VS2008 on my computer.
if it can, is there any thing I should be careful with?

Re: Can both VS2005 and 2008 be installed on XP

C^hris L^osinger25-Jul-11 3:54

C^hris L^osinger

25-Jul-11 3:54

yes, they can both be installed.

i have VC6, VS03, VS05, VS08 and VS10 on mine. they all work fine together.

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Re: Can both VS2005 and 2008 be installed on XP

«_Superman_»25-Jul-11 7:11

«_Superman_»

25-Jul-11 7:11

WOW !!!
Didn't you get your hands on any earlier versions??? Poke tongue | ;-P

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: Can both VS2005 and 2008 be installed on XP

C^hris L^osinger25-Jul-11 7:22

C^hris L^osinger

25-Jul-11 7:22

i don't need any of the other VCs. but if i could get DOS C 6.0 to run on Win7, i'd have it, too.

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Re: Can both VS2005 and 2008 be installed on XP

User 742933825-Jul-11 8:23

User 7429338

25-Jul-11 8:23

I use Microsoft C 6.0 with DosBox[^] under Windows XP. It should probably work under Windows 7 too.

modified 13-Sep-18 21:01pm.

Re: Can both VS2005 and 2008 be installed on XP

Rajesh R Subramanian25-Jul-11 3:57

Rajesh R Subramanian

25-Jul-11 3:57

It would be a good idea to install the products in the order that they were released. In your case, first install VS 2005 followed by VS 2008. Smile | :)

"Real men drive manual transmission" - Rajesh.

Re: Can both VS2005 and 2008 be installed on XP

Cold_Fearing_Bird25-Jul-11 4:14

Cold_Fearing_Bird

25-Jul-11 4:14

Thanks

Re: Can both VS2005 and 2008 be installed on XP

Albert Holguin25-Jul-11 4:22

Albert Holguin

25-Jul-11 4:22

This is very important... I have VS6, 2003, 2005, and 2008 on one machine...

Re: Can both VS2005 and 2008 be installed on XP

Jaime Olivares25-Jul-11 16:37

Jaime Olivares

25-Jul-11 16:37

They are explicity designed to be installed side by side

Best regards,
Jaime.

Re: Can both VS2005 and 2008 be installed on XP

Ni740826-Jul-11 1:54

Ni7408

26-Jul-11 1:54

yes they do just pay attention that u install 2005 first and the 2008.remember for anything put version vice first the older then the new.

Re: Can both VS2005 and 2008 be installed on XP

Stefan_Lang27-Jul-11 3:42

Stefan_Lang

27-Jul-11 3:42

I've had a setup like this some 15 years ago, and the only problem I had was the incompatibility between different versions of the MFC. I had to put copies of the correct version into a binary folder and copy my compiled binaries in there during a custom build step to make sure they would be using the correct version. Not sure if such problems still exist, or if they extend to ATL and other runtime libraries.

Visual C++ 2008 and Ultragrid 2.0

sujipal24-Jul-11 19:56

sujipal

24-Jul-11 19:56

Hai,

We have a VC++ application [Acrobat plug-in] where we are using Ultragrid 2.0 for displaying data.
It was an old application where we used VC++ 6.0 and Ultragrid 2.0, it was fine in most of the aspects, and in the grid we were displaying English and Japanese text as required.
Later on we have to upgrade our project to VC++ 2008[Visual studio 2008] for some enhancement work, But after that it is showing some junk characters for Japanese text [but for English we have no problem] in the ultragrid cell, what could be the problem here,
Does ultragrid 2.0 not support VC++ 2008 or not? Or do we need to do some changes here? And acrobat plug-ins can be implemented using only VC++, and no other language.

We cannot rewrite the whole application from the scratch as is a very large application!

What we can do to display Japanese text within the existing project, please help me.

Waiting for your valuable response.

Re: Visual C++ 2008 and Ultragrid 2.0

Code-o-mat24-Jul-11 22:07

Code-o-mat

24-Jul-11 22:07

I don't know Ultragid 2.0 or any other version of it, but maybe you need to play with font settings a bit? E.g. if you check out the LOGFONT[^] struct, it has a member called lfCharSet, maybe you need to play with that one.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> //TODO: Implement signature here<

Re: Visual C++ 2008 and Ultragrid 2.0

Maximilien25-Jul-11 3:27

Maximilien

25-Jul-11 3:27

sujipal wrote:
Does ultragrid 2.0 not support VC++ 2008 or not?

What does the author (infragistic) say about supporting VS2008 ? Did you try with a updated version of Ultragrid ?

sujipal wrote:
Or do we need to do some changes here?

Maybe ... when upgrading from a _very_ old version of Visual Studio, some changes will have to be done to either your code or the supporting libraries.

Even at the worse scenario, you should not have to re-write everything, only the part that uses the grid.

Watched code never compiles.

Help Regarding XML Parsing

pix_programmer24-Jul-11 19:55

pix_programmer

24-Jul-11 19:55

Hi!
I've an XML file whose contents are as following:

<?xml version="1.0" ?> 
<response action="registration"> 
        <element> 
        <properties name="username">cst11</properties> 
        <properties name="playerhandle">238768881697142018728993387950411141</properties> 
        <properties name="skinId">RCA001</properties> 
        <properties name="errcode" >loginnotAllowed</properties> 
        </element> 
</response>

I've to retrieve the values ("cst11","238768881697142018728993387950411141","RCA001" and "loginnotAllowed") using TinyXML. How to do this? Can any body post some sample code for this?

Re: Help Regarding XML Parsing

_AnsHUMAN_ 24-Jul-11 20:32

_AnsHUMAN_

24-Jul-11 20:32

Did you do this?[^]

You talk about Being HUMAN. I have it in my name
AnsHUMAN

Re: Help Regarding XML Parsing

pix_programmer24-Jul-11 20:52

pix_programmer

24-Jul-11 20:52

Hi!
I've written the following code. It loops every element.

TiXmlElement* child = parent->FirstChildElement();
TiXmlElement* prop = child->FirstChildElement();

while(prop)
{
     if(prop && prop->Attribute("errcode"))
     {
      errorcode = prop->GetText();
      break;
     }
     else
      prop = prop->NextSiblingElement();
     }
 }

It loops every element fine. After that I need to check for the username,playerhandle,skinId
and errcode and if it's errcode, I've to extract the "loginnotAllowed".
I don't know how to check this. I need some explanation or some code snippet
for the if block(what should be replaced with the existing to meet my requirements?).

Re: Help Regarding XML Parsing

_AnsHUMAN_ 24-Jul-11 22:46

_AnsHUMAN_

24-Jul-11 22:46

I have not used tinyXML myself, but isn't it a possibility for you to make the parent node as the node for which you get the errcode and then iterate it's children to get the value of loginnotallowed.

You talk about Being HUMAN. I have it in my name
AnsHUMAN

How to get unplug the Ethernet cable message in WSAAsyncSelect ?

wangningyu24-Jul-11 16:00

wangningyu

24-Jul-11 16:00

when I unplug the Ethernet cable,the client doesn't send the FD_CLOSE event to the server

so the server's online list isn't fresh new.

How about this ?

Re: How to get unplug the Ethernet cable message in WSAAsyncSelect ?

Richard MacCutchan24-Jul-11 21:11

Richard MacCutchan

24-Jul-11 21:11

Koma Wang wrote:
when I unplug the Ethernet cable,the client doesn't send

If the cable is unplugged there is no physical path to send on.

The best things in life are not things.

Re: How to get unplug the Ethernet cable message in WSAAsyncSelect ?

wangningyu24-Jul-11 21:21

wangningyu

24-Jul-11 21:21

First , thanks for your reply !

but how can I get it offline real-time ?

I set a timer to call CheckIsOnline() to find the client struct's m_nLastActive;

the client call SendHeartPacket() every 30 second,

and the server recv it then set the m_nLastActive.

when (GetTickCount() - m_nLastActive) >= (1000 * 10),I will remove from the list.

but when I run some days in wlan server, it be crashed,I cound't found what's wrong with it.

Frown | :(

This is my biggest headache !

Re: How to get unplug the Ethernet cable message in WSAAsyncSelect ?

Richard MacCutchan24-Jul-11 23:12

Richard MacCutchan

24-Jul-11 23:12

Koma Wang wrote:
some days in wlan server, it be crashed,I cound't found what's wrong with it.

Sorry, but that does not give us any clues as to what might be happening. If your system is crashing then you should add some trace or debug code to your program and try to trace the conditions that cause the crash.

The best things in life are not things.

Re: How to get unplug the Ethernet cable message in WSAAsyncSelect ?

wangningyu24-Jul-11 23:13

wangningyu

24-Jul-11 23:13

thanks !

Visual C++ Express receiving a custom message

martinmos23-Jul-11 8:18

martinmos

23-Jul-11 8:18

I am totally new to C++, this is the first thing I've tried to do.
I have a simple program (A) which I want to receive a message from and send a message to another app (B).
I can send messages from A to B fine but if I do then A longer sees the message sent from B, although B gets 0 as the return from the message it sends to A.
I can receive a message (Message number AuMessage obtained using RegisterWindowMessageA) once from B but the message isn't received by A a second time if I send a message to B. If I never send a message to B I can keep receiving the messages in A.

Obviously I'm doingsomething wrong. Every reference seems to tell me to use something like this

BEGIN_MESSAGE_MAP(szWindowClass, CMyParentWndClass)
	//{{AFX_MSG_MAP(CWordPadApp)
	//AFX_MSG_MAP 
//	ON_MESSAGE(AuMessage,HandleAuCommand);
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

but I cannot see how to find CMyParentWndClass, so I have added code to WinProc like this

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

          //added this if clause
	if (message == AuMessage )
		{msgin = 7;some flag I intend to use
		 return 76;//any number for tests just so the sending app sees a reply
		}

	switch (message)
...

I couldn't add a new case because using a variable (AuMessage ) gives a compilation error.

How should I handle receiving and sending custom messages? Or can anyone supply a link where I can find the correct approach?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.