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Did you see C++ Libraries On codeproject
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hi good day to everyone. why do i have this kind of warning to my functions?
warning C4100: 'nFaceRecNo' : unreferenced formal parameter
what does it mean? thanks for your reply 
positive vibes
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It means that the parameter "nFaceRecNo" isn't used in the function. The best way to get rid of this warning is as follows:
void Foo(int n)
{
}
void Foo(int)
{
}
Note that in the code without the warning I've removed any parameters which I don't use in the function from the function definition. It can still be present in the declaration. There are other ways of resolving this problem but this is how I normally deal with it.
Steve
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thanks so much steve... problem solved here
positive vibes
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We have several VC7 MFC and ATL applications and are wondering whether to port them over to VC8. The main reason is so that we don't have a mix of development environments - some projects using vs2003 and some using vs2005.
But are there any advantages as far as the libraries go - STL/ATL/MFC? I understand the main change is in the C runtime string functions to reduce buffer overflow problems. Any other changes for better or worse?
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Yes, basically if you use C string functions, you'll get a warning. Beyond that, I see no compelling reason to change, there are some breaking changes for standards, but all reasonably obscure.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Sir,
I want to learn how to make a web application in vc++.net.
Please send any link .
Thanks.
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I don't believe you can use C++ for ASP.NET. Your profile says you know ASP.NET, why do you want to write a web app in c++ ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Hi..
Is there a way to prevent a file from being opened in windows ....
The System is not a part of any network..
There is No other users except Administrator is available in the system.
Thanks
Luck is Opportunity with hardwork
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Asking the question again will not change the answer....
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Luck is Opportunity with hardwork
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Sir,
I want to connect the database(Sql Server) to vc++.net 1.1 programically.I also want to use insert delete update queries in the form .Please help me or please send any link for the problem.
Thanks.
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Did you search on codeproject?
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it is the classic "hello,world" example, I am using VC++6.0,when I create a project and include the .h and .cpp file into it and compile, it pops out these errors:
--------------------Configuration: chapter 1_0 - Win32 Debug--------------------
Compiling...
hello.cpp
Linking...
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex
Debug/chapter 1_0.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.
chapter 1_0.exe - 3 error(s), 0 warning(s)
[code]
//Hello.h
class CMyApp : public CWinApp
{
public:
virtual BOOL InitInstance ();
};
class CMainWindow : public CFrameWnd
{
public:
CMainWindow ();
protected:
afx_msg void OnPaint ();
DECLARE_MESSAGE_MAP ()
};
//Hello.cpp
#include <afxwin.h>
#include "Hello.h"
CMyApp myApp;
/////////////////////////////////////////////////////////////////////////
// CMyApp member functions
BOOL CMyApp::InitInstance ()
{
m_pMainWnd = new CMainWindow;
m_pMainWnd->ShowWindow (m_nCmdShow);
m_pMainWnd->UpdateWindow ();
return TRUE;
}
/////////////////////////////////////////////////////////////////////////
// CMainWindow message map and member functions
BEGIN_MESSAGE_MAP (CMainWindow, CFrameWnd)
ON_WM_PAINT ()
END_MESSAGE_MAP ()
CMainWindow::CMainWindow ()
{
Create (NULL, _T ("The Hello Application"));
}
void CMainWindow::OnPaint ()
{
CPaintDC dc (this);
CRect rect;
GetClientRect (&rect);
dc.DrawText (_T ("Hello, MFC"), -1, &rect,
DT_SINGLELINE ¦ DT_CENTER ¦ DT_VCENTER);
}
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See MSDN article Q126646.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Oh, I forgot the project setting: "using MFC in a shared DLL"
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Hello everyone!
OK, I've been making posts about this specific mother-freaking hair-greener problem, but now I got it just where I want it: I got it down to a 34-line file, no references to it in the rest of the program, just included once in my Includes.h file... Here it is:
<br />
#ifndef _MAPHANDLING_H_<br />
#define _MAPHANDLING_H_<br />
<br />
namespace MapHandling<br />
{<br />
struct TileFile<br />
{<br />
SDL_Surface *layers[4];<br />
<br />
int s, w, h;<br />
<br />
TileFile() : s(0), w(0), h(0) {}<br />
<br />
TileFile(int size, int w, int h, const std::string& filename) :<br />
s(s), w(w), h(h)<br />
{<br />
layers[1] = IMG_Load(filename.c_str());<br />
<br />
if (!layers[1])<br />
exit(0);<br />
}<br />
} Tilesets[1];<br />
<br />
void LoadTiles()<br />
{<br />
Tilesets[0] = TileFile(24, 3, 2, "./Graphics/Tiles.png");<br />
}<br />
};<br />
<br />
#endif // _MAPHANDLING_H_
Note that the exact same thing happens on both VC++ 2005 and Code::Blocks. (Different error messages, of course, but same idea)
These are the VC++ errors:
1>------ Build started: Project: War Game, Configuration: Release Win32 ------<br />
1>Compiling...<br />
1>Player.cpp<br />
1>Main.cpp<br />
1>HelperFuncs.cpp<br />
1>Game.cpp<br />
1>Generating Code...<br />
1>Linking...<br />
1>HelperFuncs.obj : error LNK2005: "void __cdecl MapHandling::LoadTiles(void)" (?LoadTiles@MapHandling@@YAXXZ) already defined in Game.obj<br />
1>HelperFuncs.obj : error LNK2005: "struct MapHandling::TileFile * MapHandling::Tilesets" (?Tilesets@MapHandling@@3PAUTileFile@1@A) already defined in Game.obj<br />
1>Main.obj : error LNK2005: "void __cdecl MapHandling::LoadTiles(void)" (?LoadTiles@MapHandling@@YAXXZ) already defined in Game.obj<br />
1>Main.obj : error LNK2005: "struct MapHandling::TileFile * MapHandling::Tilesets" (?Tilesets@MapHandling@@3PAUTileFile@1@A) already defined in Game.obj<br />
1>Player.obj : error LNK2005: "void __cdecl MapHandling::LoadTiles(void)" (?LoadTiles@MapHandling@@YAXXZ) already defined in Game.obj<br />
1>Player.obj : error LNK2005: "struct MapHandling::TileFile * MapHandling::Tilesets" (?Tilesets@MapHandling@@3PAUTileFile@1@A) already defined in Game.obj<br />
1>..\Release/War Game.exe : fatal error LNK1169: one or more multiply defined symbols found<br />
1>Build log was saved at "file://c:\Incoming\War Game\Visual Studio 2005\Release\BuildLog.htm"<br />
1>War Game - 7 error(s), 0 warning(s)<br />
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
If I remove the #include to this file, it compiles zezw. (Zero Errors, Zero Warnings).
Can anyone tell me what's the problem? I have another file that does the same thing, so I'll post it if needed... Thanks! 
Windows Calculator told me I will die at 28. 
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Aha! The problem is with variable and function declaration... Look:
<br />
#ifndef _MAPHANDLING_H_<br />
#define _MAPHANDLING_H_<br />
<br />
namespace MapHandling<br />
{<br />
struct TileFile<br />
{<br />
SDL_Surface *layers[4];<br />
<br />
int s, w, h;<br />
<br />
TileFile() : s(0), w(0), h(0) {}<br />
<br />
TileFile(int size, int w, int h, const std::string& filename) :<br />
s(s), w(w), h(h)<br />
{<br />
layers[1] = IMG_Load(filename.c_str());<br />
<br />
if (!layers[1])<br />
exit(0);
}<br />
} TF;
<br />
void func() {};
};<br />
<br />
#endif // _MAPHANDLING_H_<br />
Look at the lines with the HERE on them... Those two cause trouble (a few redefinition errors). So, anyone guess what's wrong? Thanks!
(PS: I doubleposted because the first post would look too long...  )
Windows Calculator told me I will die at 28.
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Hello all,
I've downloaded Visual C++ Express Edition for the first time and I enjoy programming with it. I have a question that I can't seem to figure out. Everytime I start a new C++ project, I have to constantly write the preprocessor directive "#include <iostream>" in my programs. How do I go about starting new projects with this directive already included in my programs? Thanks!
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You can't. Having to put that through your files is part of C++. You may be able to create an appwizard that has the includes you tend to use in your main cpp file, but that's about it.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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I have a grid (Chris Maunder's MFC Grid) on a formview in one pane of a CSplitterWnd object. The formview has a function called Refresh(). Inside of Refresh(), I call a function of the grid (SetRowCount(1)). Within SetRowCount() it checks to see if 'rows' that I sent in is equal to GetRowCount() like so:
ASSERT(nRows >= 0);
if (nRows == GetRowCount())
return bResult;
This works fine when Refresh is called from anywhere else within the form itself. The Refresh() function is public and from another pane I get the CMainFrame* (which has a pointer to the Form that has the grid) and I call the Refresh() function and I get an Access Violation error on this line:
int GetRowCount() const { return m_nRows; }
which is being called from the code above in SetRowCount(). Does anyone have any idea what the ^&*( is going on?
Thanks,
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before you make that call to GetRowCount, what does the pointer to the Grid look like ? is it the same value you see when you call Grid functions that don't cause AVs ?
cause, that sounds a bit like a bogus pointer problem...
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BlackDice wrote: Does anyone have any idea what the ^&*( is going on?
Is this NULL or a dangling/invalid pointer? Sounds like it...
--
Secreted by the Comedy Bee
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