Visual C++ :: Creating DLL That Will Be Used As Plugin In External Program Using MFC
Jan 30, 2013
This is the problem in detail:
I have a VC++ project to create a DLL that will be used as a Plug-in in an external programm. This DLL uses some MFC functions. The initial configuration of the project was:
-Use of MFC: Use MFC in a Static Library
-Common Language Runtime support: No Common Language Runtime support
-Runtime Library: Multi-threaded Debug (/MTd)
This configuration worked fine, there were no compilation errors and the resulting DLL worked correctly.
The problem came when it was necessary to add to the DLL some functions of .NET, using the namespace System and similar. To do that, I had to change the Common Language Runtime support, to Common Language Runtime Support (/clr). Then, when I tried to compile, I got this message:
'/MTd' and '/clr' command-line options are incompatible
So I changed the Runtime Library to Multi-threaded Debug DLL (/MDd). Then I got this error message:
Building MFC application with /MD[d] (CRT dll version) requires MFC shared dll version
So I also changed the Use of MFC to Use MFC in a Shared DLL.
After this, the compilation was correct. Then logically the size of the generated DLL is smaller, but this new DLL does not work correctly, the external program in which this DLL is used crashes.
I don't know what to do to fix the problem. Maybe I need to add some other DLLs or files to the directory where the DLL is located, where the external program uses it. But I would prefer to include a single DLL file, but this seems to be incompatible with the use of .NET functionality.
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Jul 28, 2014
Is it possible to create an NPAPI Plugin in VC++, that is cross browser compatible or should atleast work in Chrome Browser?
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Apr 5, 2014
I'm trying to create a public and static field in a class called ResourceManager. But when trying to access the field even from inside the class it wont work. I'm getting this error message:
Error 1 error LNK2001: unresolved external symbol "public: static int ResourceManager::num" (?num@ResourceManager@@2HA)
Here's my code:
ResourceManager.h
Code:
class ResourceManager {
public:
static int num;
static void loadContent();
[Code] .....
I'm using Visual Studio 2012.
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Jan 15, 2013
I wanna create a DLL from my C++ program. My output of my C++ program is a text file called Centre_Cartouche.txt My output is two text files called brd.txt and sym.txt
At the beginning my program was just a main which contains all development (Main.cpp). Now I created function (in _Cartouche.h and _Cartouche.cpp).
My debugger tell me that the simulation works. But my file Centre_Cartouche.txt is not create.
_Cartouche.cpp_Cartou.hbrd.txtsym.txt
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Nov 10, 2012
My assignment is to create a C++ Program to find the sine of a number without any library other than iostream by using Taylor Series:
sin (x) = (x/1!) - (x^3/3!) + (x^5/5!) - (x^7/7!) + (x^9/9!) ...... (x^n/n!).
Here is what i have done till now:
#include <iostream>
double fact (int f); //declaration of factorial function
double power(double x, int y); //declaration of power function
double sin(int x); //declaration of sine function
//double cos(int x); //declaration of cosine function
//double tan(int x); //declaration of tangent function
[code]....
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Oct 27, 2014
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1. double slashes need to be used.
2. the command that worked for me was "ShellExecuteEx"
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Jul 11, 2014
The project builds on Win32 platform, but not on x64.
Full error message: dllentry.obj : error LNK2001: unresolved external symbol "class CFactoryTemplate * g_Templates" (?g_Templates@@3PAVCFactoryTemplate@@A)
The dllentry.cpp (a DirectShow base class) compiles on both platforms. It contains the external declarations:
extern CFactoryTemplate g_Templates[];
extern int g_cTemplates;
g_Templates[] is then used in two functions:
__control_entrypoint(DllExport) STDAPI DllGetClassObject(__in REFCLSID rClsID,
__in REFIID riid, __deref_out void **pv)
[Code]...
myClass.cpp contains the definitions for the two externals in dllentry.cpp, at top level, just after the includes:
CFactoryTemplate* g_Templates=0;
int g_cTemplates=0;
myClass.cpp also compiles by itself, but the project does not build. I checked all the libraries in the project settings and all seems to be OK, the 64 bit versions are used.
What should I do to make the project build for x64 platform?
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Jul 31, 2013
I am getting this error while compiling my c++ project in Visual Studio2005,
Error3error LNK2001: unresolved external symbol "class OdRxModule * __cdecl odrxCreateModuleObject_For_OdRasterProcessingServicesImpl(class OdString const &)" (?odrxCreateModuleObject_For_OdRasterProcessingServicesImpl@
@YAPAVOdRxModule@@ABVOdString@@@Z)DwgDirect.obj
Error4error LNK2001: unresolved external symbol "class OdRxModule * __cdecl
[code]....
eventhough i linked all the .lib files under the path
1 . Project->Properties->Configuration Properties->Linker->Input->Additional Dependencies->
2. Toolos->options->VC++ Directories
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Jan 11, 2013
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Mar 24, 2013
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May 14, 2013
How is it possible to store the related data of a program C++ into an external file (like as .txt) and retrieve it?
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like as
Code:
class profile {
private: int id,phone;
public:
void retriever() {
cout<<"Enter your ID: ";
cin>>id;
cout<<"Your Phone number is "<< phone;
};
}
avoiding formats in above class, purpose is to store data already in txt file with different id and phone numbers and it is to be retrieved by matching id number to txt file and viewing its related phone number.
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Jan 17, 2013
When I try to compile a program from a C book I am following I am getting these errors, I have looked for ways to resolve it but I wasn't able to.
Errors:
Error3error LNK2001: unresolved external symbol _druk_instructiesC:UsersIvoDocumentsVisual Studio 2012ProjectsConsoleApplication2ConsoleApplication2Handspel.objConsoleApplication2
Error4error LNK2001: unresolved external symbol _speler_keuzeC:UsersIvoDocumentsVisual Studio 2012ProjectsConsoleApplication2ConsoleApplication2Handspel.objConsoleApplication2
Error5error LNK2001: unresolved external symbol _machine_keuzeC:UsersIvoDocumentsVisual Studio
[Code] .....
The .h file:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string>
#ifdef __cplusplus
extern "C"
[Code] .....
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May 13, 2013
Perhaps this can be a very popular error,
Code:
#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <string>
#include <fstream>// enable writing to and reading from files
#include <cstdlib>
#include <time.h>
using namespace std;
class Person {
[Code] .....
Error list:
Code:
Error 1 error LNK2019: unresolved external symbol "void __cdecl saveperson(void)" (?saveperson@@YAXXZ) referenced in function _main H:Cry_DevProgrammingC++Using_class_ in_ c++Using_class_ in_ c++Using_class_ in_ c++.obj
Error 2 error LNK2019: unresolved external symbol "void __cdecl displayperson(void)" (?displayperson@@YAXXZ) referenced in function _main H:Cry_DevProgrammingC++Using_class_ in_ c++Using_class_ in_ c++Using_class_ in_ c++.obj
Error 3 error LNK2019: unresolved external symbol "void __cdecl editperson(void)" (?editperson@@YAXXZ) referenced in function _main H:Cry_DevProgrammingC++Using_class_ in_ c++Using_class_ in_ c++Using_class_ in_ c++.obj
Error 4 error LNK1120: 3 unresolved externals H:Cry_DevProgrammingC++Using_class_ in_ c++DebugUsing_class_ in_ c++.exe 1
What I can do to fit this problem?
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Dec 27, 2012
I'm looking at writing my own plug-in app, but I know that deleting class instances that were created in a plug-in module can result in the dreaded "undefined behaviour" because of the different memory spaces. Many examples of plug-ins use create_class and destroy_class functions to resolve this problem, but I wondered about overriding / overloading the class's new and delete operators. This would be used for all third-party library class derivations (e.g. derived GUI classes) and all home-grown classes.
The operators would only be declared in the class declaration:
class PluginBase {
public:
void *operator new(std::size_t n);
void operator delete(void *p);
// Other plugin bits
While the actual implementation would be defined in the plug-in's implementation file:
#include "PluginBase.h"
void *PluginBase::operator new(std::size_t n) {
return ::operator new(n);
[Cvoid PluginBase::operator delete(void *p) {
return ::operator delete(p);
}
This would need to be implemented in every transferable plug-in class (possibly by a crafty IMPLEMENT_PLUGIN(classname) macro or some other mechanism), but before I commit this to my code I was hoping for feedback. Does this sound like a good idea? The GUI classes in particular are handled by a third-party library, so it's some memory-space safe way of deleting them by the GUI library (in the app) that I'm looking for.
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Mar 23, 2014
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PHP Code:
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By the way, I am using Visual Studio 2013.
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May 27, 2013
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Sep 17, 2013
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May 10, 2014
I am trying to simulate the logical circuits having NAND gates. I am reading the structure from .bench file. The structure of a circuit looks like below:
Code:
INPUT(1)
INPUT(2)
INPUT(3)
INPUT(6)
INPUT(7)
10 = NAND(1, 3)
11 = NAND(3, 6)
16 = NAND(2, 11)
19 = NAND(11, 7)
22 = NAND(10, 16)
23 = NAND(16, 19)
It can be seen that the inputs for Gate 22 are 10 and 16 which are also NAND gates. On the other hand, for gate 10, the inputs are 1 and 3 which are simple inputs. So, i need to sort the gates topologically. Although topological sort will not affect the output for this particular example but i have big circuits also in which topological sort is required. But we can use this simple example to do the topological sort.
My effort:I thought to create a map which will keep the information about the gate name and its indegree. But i am unable to proceed further.
Code:
void Circuit::topologicalSort()//topological sorting (for the mixed circuits) {
int counter = 0;
std::map<string, int> unsortTopoList; //this list keeps a track of gate name and its Indegree
for(int i=0; i<gates.size(); i++) {
[code].....
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Apr 17, 2013
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Code:
intSetProperty( LPPROFSECT lpProfileSection, LPSPropValue lpPropValue) {
HRESULT hr;
LPPROPDATA lpPropData;
SPropValue spvEID;
[Code] .....
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Code:
#include <Simple_window.h>
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struct Box: Shape{
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[Code] .....
When I ran it I faced this exception:
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