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hi all
iam facing link error "unresolved externall symboll" while loading my dll explicitly, but it work i load implicitly, here i given the sample by which i tryed, and i defined all the virtual function in the derived class, which in the base class
#include "stdafx.h"
#include "windows.h"
int main(int argc, char* argv[])
{
typedef UINT (CALLBACK* LPFNDLLFUNC1)(DWORD,UINT);
HINSTANCE hDLL; // Handle to DLL
LPFNDLLFUNC1 lpfnDllFunc1; // Function pointer
UINT uParam2, uReturnVal;
DWORD dwParam1;
//HMODULE dll_module = LoadLibrary("./../TestDll/Debug/TestDll.dll");
hDLL = LoadLibrary("./../TestDll/Debug/TestDll.dll");
if (hDLL != NULL)
{
lpfnDllFunc1 = (LPFNDLLFUNC1)GetProcAddress(hDLL,
"MyAbsFunc1");
if (!lpfnDllFunc1)
{
// handle the error
FreeLibrary(hDLL);
return 0;
}
else
{
// call the function
uReturnVal = lpfnDllFunc1(dwParam1, uParam2);
}
}
return 0;
}
can any one help to solve this link error
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you have to specify the lib name in the project setting. or atleat put
#pragma comment(lib, "./../TestDll/Debug/TestDll.lib") in your code.
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Sivakumar R wrote: iam facing link error "unresolved externall symboll"
What's the symbol?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
"Go that way, really fast. If something gets in your way, turn."
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Hi All
I have to application and one Application is writing something in file and another one is reading from that file. And i used FindFirstChangeNotification but it is working some time and some time it is not working so i want to use create mutex for this communication and i am very new in Mutex and tried my level best to achive but count not carck.
can any one help, How will i use MUtex.
Thank In advance
RYK
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Hi,
So called "named Mutexes" can be uses between processes. So in this case give the Mutex the name of the File yout are using. But be careful, i think backlashes don't work with mutexes, so you should replace backslashes with some other character.
cu
a.
i know nothing
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Hi,
just found some code that might help you:
HANDLE GetMutex()<br />
{<br />
CString Key = m_FileName;
Key.Replace('\\', '_');<br />
<br />
HANDLE hMutex = ::OpenMutex(SYNCHRONIZE, TRUE, Key);<br />
<br />
if (!hMutex) {<br />
SECURITY_ATTRIBUTES sa;<br />
<br />
sa.nLength = sizeof(sa);<br />
sa.lpSecurityDescriptor = NULL;<br />
sa.bInheritHandle = TRUE;<br />
<br />
hMutex = ::CreateMutex(&sa, FALSE, Key);<br />
}<br />
<br />
return hMutex;<br />
}
cu.
a.
i know nothing
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hi i have to disable UAC in vista while running my application and at last i have to enable it. how to do this in vc++. im a new bie to vista. pls help me
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You have a non Vista compliant application. I advise you to read and Michael Dunn's articles about Vista here at CP.
If you really need "Admin stuff" in your app, you have to redesign it so, some buttons have a shield icon and start an Real Admin exe.
Greetings from Germany
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You can turn UAC off for a particular user but not switch it on and off willy nilly like you’re after.
Steve
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Is this a good tip? I dont believe so.
(I answered him to)
Greetings from Germany
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Hi all,
How would one go about using the delete command when working with AnsiString?
I have tried:
AnsiString Test;
...
delete [] Test;
But received this error: [C++ Error] E2157 Deleting an object requires exactly one conversion to pointer
operator.
Can anyone help me?
Regards,
The only programmers that are better that C programmers are those who code in 1's and 0's ![Green Alien | [Alien]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/alien.gif)
 Programm3r
My Blog: ^_^
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AnsiString Test;
is'n allocated dynamically, so you don't need to delete it;
Even it's allocated dynamically via AnsiString *str = new AnsiString("test");
you only need to delete it via "delete str" and not via "delete[] str"
Regards
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I have read this article:Memory leaks in C++ and how to avoid them[^] , and it stated the following:
A memory leak is what happens when you forget to free a block of memory allocated with the new operator
or when you make it impossible to do so.
So can I assume that that one only free's a block of memory when the new operator was used.
i.e.
char *string;
string = new char[20];
delete [] string;
char *tString = "this is a test; // is it nessacery to delete this pointers memory??
Many Thanks
Regards,
The only programmers that are better that C programmers are those who code in 1's and 0's
Programm3r
My Blog: ^_^
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Programm3r wrote: So can I assume that that one only free's a block of memory when the new operator was used.
i.e.
Programm3r wrote: char *tString = "this is a test; // is it nessacery to delete this pointers memory??
You can assume so, compiler allocated memory for constant string and let the compiler free's it.
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Read the MSDN about new and delete ... 
Greetings from Germany
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Dear all
I need to develop a new algorithm for clustering( for example, human, animal and inanimate objects). actually this is a brand new topic for me. i never did such topic before. does anyone has any clustering code using VC++, let me work as reference. thanks a lot.
urgent!!!!!!!!!
Li Zhiyuan
4/07/2007
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Think about a class structure. Basic class maybe "CObject" and derive other classes with additional features. They all can you put in a CObjArray. (MFC)
This is a real student task.
Greetings from Germany
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Hi all,
How to find programmatically (C++/MFC) whether entered text is LTR - Left To Right (English) or RTL - Right To Left (Arabic) text.
Thank you
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HI. Is this question is regarding a particular control or edit box / OR / any for string?
Nice talking to you. If you judge people, you have no time to love them. -- Mother Teresa
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This depends on the actual system language better check this with GetLocaleInfo(...)
Greetings from Germany
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What if Locale is Set to English, and Arabic is selected from Language Bar. GetLocaleInfo() won't help..
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