I'm trying to make a solution in Visual Studio that consists of a VC++ DLL (C++/CLI) and a VB.Net application. To figure this out, I created a VC++ Class Library project, with the following code (I removed all the junk the wizard creates):
mathfuncs.cpp:
#include "MathFuncs.h"
namespace MathFuncs
{
double MyMathFuncs::Add(double a, double b)
{
return a + b;
}
}
mathfuncs.h:
using namespace System;
namespace MathFuncs
{
public ref class MyMathFuncs
{
public:
static double Add(double a, double b);
};
}
This compiles quite happily. I can then add a VC++ console project to the solution, add a reference to the original project for this new project, and call it as follows:
test.cpp:
using namespace System;
int main(array<System::String ^> ^args)
{
double a = 7.4;
int b = 99;
Console::WriteLine("a + b = {0}",
MathFuncs::MyMathFuncs::Add(a, b));
return 0;
}
This works just fine, and will build to test.exe and mathsfuncs.dll.
However, I want to use a VB.Net project to call the DLL. To do this, I add a VB.Net project to the solution, make it the startup project, and add a reference to the original project. Then, I attempt to use it as follows:
MsgBox(MathFuncs.MyMathFuncs.Add(1, 2))
However, when I run this code, it gives me an error:
Could not load file or assembly 'MathFuncsAssembly, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Do I need to expose the method somehow?
I'm using Visual Studio 2008 Professional.
I get that sometimes when the project platform is not set correctly.
Go to your project settings > Compile > Advanced Compile options and select target CPU x86.
Related
So I've been learning C++ and I've been trying to learn some SFML 2 via some videos. At first I had no real issues, I was using MS VS2012 and everything was fine. I start using MS VS2015 Community and it all starts going wrong and I've got no idea why!
Main problem:
Everything compiles, but it just crashes when I try to use sf::RenderWindow::createWindow()
Error Message:
I get the message "SFML_Project.exe is no longer working",
I go to debug it and it gives me the following message:
Unhandled exception thrown: read access violation.
this->_Ptr was 0xCCCCCCCC.
If there is a handler for this exception, the program may be safely continued.
and it does it on this function (some SFML code I know nothing about)
const facet *_Getfacet(size_t _Id) const
{ // look up a facet in locale object
const facet *_Facptr = _Id < _Ptr->_Facetcount
? _Ptr->_Facetvec[_Id] : 0; // null if id off end <- ON THIS LINE OF CODE IT BREAKS
if (_Facptr != 0 || !_Ptr->_Xparent)
return (_Facptr); // found facet or not transparent
else
{ // look in current locale
locale::_Locimp *_Ptr = _Getgloballocale();
return (_Id < _Ptr->_Facetcount
? _Ptr->_Facetvec[_Id] // get from current locale
: 0); // no entry in current locale
}
}
Line of info that was given at the Call Stack
sfml-system-d-2.dll!std::locale::_Getfacet(unsigned int _Id) Line 451 C++
My Code:
#include <iostream>
#include "SFML\Graphics.hpp"
int main()
{
sf::RenderWindow window;
window.create(sf::VideoMode(800, 800), "WindowName");
sf::Texture texture;
sf::Sprite sprite;
texture.loadFromFile("Player.png");
sprite.setTexture(texture);
sf::Event eventHandler;
while(window.isOpen())
{
while(window.pollEvent(eventHandler))
{
switch(eventHandler.type)
{
case sf::Event::Closed:
window.close();
break;
}
}
window.clear();
window.draw(sprite);
window.display();
}
}
SFML version: Visual C++ 14 (2015) - 32-bit
Project Properties:
Debug -> C/C++ -> General -> Additional Include Directories:
$(SolutionDir)/SFML-2.3.2/include
Debug -> Linker -> General -> Additional Library Directories:
$(SolutionDir)/SFML-2.3.2/lib
Debug -> Linker -> Input -> Additional Dependencies:
sfml-main-d.lib
sfml-window-d.lib
sfml-graphics-d.lib
sfml-system-d.lib
sfml-network-d.lib
sfml-audio-d.lib
What I've tried:
I've tried turning all the dependencies from sfml-XX-d.lib to sfml-XX.lib files, which does allow me to create a window and draw shapes to that window, but then when I try to use sf::Texture::loadFromFile("filename") the console command window turns into the matrix and starts beeping.
It might be because you link the window lib before the graphics lib.
Try to move up the window lib under the graphics lib.
sfml-graphics-d.lib
sfml-window-d.lib
sfml-system-d.lib
If it's still crashing, it may because your sfml's dlls does not match the current sfml version that you have. Happened to me once, I downloaded a new version of sfml without updating the binaries.
I'm currently working on a project using Borland C++, I have two Forms so far but each one in an independent Project, I wish to join these two project into one project so I can switch between the Forms.
I want to have only one executable file (for security purposes), I tried reading some pdfs about borland c++, also tried googling it, but no luck.
if there's a way to do so, I wish you could guide me or give me some hints.
Note: I'm using Borland C++ Builder 6, under Windows 8.1.
I am used to BDS2006 so for newer IDE/Compilers it can be different
1.form copy
has .h,.cpp,*.dfm files
copy them to target project directory
2.open target project in IDE
3.add forms to project
find add to project in IDE main menu (I think it is in Project tag)
then select *.dfm files of your new forms click add or OK ...
4.Open target project source code (*.cpp)
should look like this:
//$$---- EXE CPP ----
//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
//---------------------------------------------------------------------------
//*** here you have line for each form type and its name in forms menu
USEFORM("win_view.cpp", win_view);
USEFORM("win_main.cpp", win_main);
USEFORM("win_editor\win_editor_setup.cpp", win_EditorSetup);
USEFORM("win_editor\win_editor.cpp", win_editor);
USEFORM("win_editor\win_editor_find.cpp", win_EditorFind);
//---------------------------------------------------------------------------
WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
{
try
{
Application->Initialize();
//*** here create form for each static form you want
//*** dynamic windows (created in runtime are not here !!!
Application->CreateForm(__classid(Twin_main), &win_main);
//*** here load cross references to forms if needed
Application->Run();
}
catch (Exception &exception)
{
Application->ShowException(&exception);
}
catch (...)
{
try
{
throw Exception("");
}
catch (Exception &exception)
{
Application->ShowException(&exception);
}
}
return 0;
}
//---------------------------------------------------------------------------
5.dynamic forms
add #include of *.h for all dynamic/used inside form files to main form cpp file
this makes them accessible from main form
now you can crete / destroy windows
should look like this:
//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "win_main.h"
//*** add the dynamic/used forms *.h files
#include "win_view.h"
#include "win_editor\win_editor.h"
//---------------------------------------------------------------------------
//*** add pointer to dynamic forms
Twin_view *win_view=NULL;
//---------------------------------------------------------------------------
void __fastcall Twin_main::some_event(...)
{
win_view=new Twin_view(win_main);
if (win_view)
{
win_view->OnResize(win_view);
win_view->_can_close=false;
}
}
//---------------------------------------------------------------------------
void __fastcall Twin_main::FormDestroy(TObject *Sender)
{
//*** destroy form before exiting also can call ->Close() and wait few [ms] before
if (win_view) { delete win_view; win_view=NULL; }
}
//-------------------------------------------------------------------
you can also move the form pointers to owner form class to make it more objective c++ like
and allow to make multiple originaly main forms in future (in another project later)
6.static used forms
just include *.cpp file instead of *.h
the pointer to these forms are directly in *.cpp files (at the start)
[notes]
if your forms have some global variables
then you can not use more then 1 form of that type
also the global variable names have to be different between used forms
do not change namespace for them it will make VCL crazy
I am trying to run a sample code from the OpenNI 1.5 documentation.I have imported the library required XnCppWrapper.h so that I can use C++.The code has only one error on a particular variable "bshouldrun".I know that it should be declared as something but since I am new at this and the documentation does not contain anything above the main, I dont know what to declare it as..Please help!!
And thanks in advance.
#include <XnOpenNI.h>
#include <XnCppWrapper.h>
#include <stdio.h>
int main()
{
XnStatus nRetVal = XN_STATUS_OK;
xn::Context context;
// Initialize context object
nRetVal = context.Init();
// TODO: check error code
// Create a DepthGenerator node
xn::DepthGenerator depth;
nRetVal = depth.Create(context);
// TODO: check error code
// Make it start generating data
nRetVal = context.StartGeneratingAll();
// TODO: check error code
// Main loop
while (bShouldRun) //<-----------------------------**ERROR;bShouldRun Undefined**
{
// Wait for new data to be available
nRetVal = context.WaitOneUpdateAll(depth);
if (nRetVal != XN_STATUS_OK)
{
printf("Failed updating data: %s\n", xnGetStatusString(nRetVal));
continue;
}
// Take current depth map
const XnDepthPixel* pDepthMap = depth.GetDepthMap();
// TODO: process depth map
}
// Clean-up
context.Shutdown();
}
Here's what I did to run a sample from Visual Studio 2010 Express on Windows (8):
Opened the NiSimpleViewer.vcxproj VS2010 project from C:\Program Files (x86)\OpenNI\Samples\NiSimpleViewer
Edited OpenNI.rc to comment out #include "afxres.h" on line 10(might be missing this because I'm using Express version, not sure. Your machine might compile this fine/not complain about the missing header file)
Enabled Tools > Options > Debugging > Symbols > Microsoft Symbol Servers (to get past missing pdb files issue)
Optionally edit the SAMPLE_XML_PATH to "SamplesConfig.xml" rather than the default "../../../Data/SamplesConfig.xml", otherwise you need to run the sample executable from ..\Bin\Debug\NiSimpleViewer.exe by navigating to there rather than using the Ctrl+F5. A;so copy the SamplesConfig.xml file into your sample folder as you can see bellow
Here are a few images to illustrate some of the above steps:
You can also compile the NiHandTracker sample, which sounds closer to what you need.
So this explains the setup for OpenNI 1.5 which is what your question is about.
I've noticed your OpenNI 2 lib issue in the comments. It should be a matter of linking against SimpleHandTracker.lib which you can do via Project Properties (right-click project->select Properties) > Linker > Input > Additional Dependencies > Edit.
I don't have OpenNI2 setup on this machine, but assuming SimpleHandTracker.lib would be in OpenNI_INSTALL_FOLDER\Lib. Try a file search in case I might be wrong.
there is any way to have an execution file (*.exe) that run in a folder that doesn't have the dlls referenced by the project??
for example:
using namespace System;
using namespace dllNet;
int main(array<System::String ^> ^args)
{
dllNet::Class1::SayHi();
Console::WriteLine(L"Hello World");
return 0;
}
i want to execute my project without dllNet.dll
No, unfortunately, the program cannot run without the libraries needed.
i have got a ScreenCameraSDK and it comes with a 11kb dll file, it has a documentation too which lists the functions which can be used. It says
ScreenCamera SDK ActiveX Reference Documentation
ActiveX Reference
The ActiveX ID on the system is: ScreenCameraSDK.RemoteControl
Every method on the interface returns FAIL or SUCCESS. (0 or 1).
Create an instance of the ActiveX on your application, and then call InitializeScreenCameraRemoteControl. If the return value is SUCCESS then ScreenCamera is properly installed and you can then call any other method on the ActiveX's interface. If not ScreenCamera could not be found and you should contact support.**
Now my question is, i have the dll and no other files. How can i use the functions inside it in a VC++ Project with Visual Studio 2008.
Thanks
I TRIED THE FOLLOWING CODE BUT GOT COMPILATION ERROR OF UNDEFINED IDENTIFIER
#include <stdio.h>
// This is the path for your DLL.
// Make sure that you specify the exact path.
#import "e:\ScreenCameraSDK.dll" no_namespace
void main()
{
BSTR bstrDesc;
try
{
CoInitialize(NULL);
short st = 2;
short st1;
// Declare the Interface Pointer for your Visual Basic object. Here,
// _Class1Ptr is the Smart pointer wrapper class representing the
// default interface of the Visual Basic object.
_Class1Ptr ptr;
// Create an instance of your Visual Basic object, here
// __uuidof(Class1) gets the CLSID of your Visual Basic object.
ptr.CreateInstance(__uuidof(Class1));
st1 = ptr->MyVBFunction(&st);
}
catch(_com_error &e)
{
bstrDesc = e.Description();
}
CoUninitialize();
}
it says _Class1Ptr is unknown!
BSTR bstrDesc;
try
{
HRESULT hr= CoInitialize(NULL);
CLSID clsid;
hr = CLSIDFromProgID(OLESTR("<complete class name as see in registry>"),&clsid);
short st = 2;
short st1;
//nameOfClassInOCX is placeholder for explanation. If you OCX com class name is blabla
//use _blabla and so on.
_nameOfClassInOCX * ptr;
hr = CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,__uuidof(_nameOfClassInOCX ),(LPVOID*)&ptr);
cout << ptr->GetFees("hi") <<endl;
ptr->Release();
}
catch(_com_error &e)
{
bstrDesc = e.Description();
}
CoUninitialize();
First of all you have to do this is #import the dll, and the compiler will automatically generate all required definitions from it. Then create objects from the library by using either smart pointers, or CreateInstance().
#import "C:\files\test.dll" no_namespace rename("EOF", "EOFile")
...
int main() {
if (FAILED(::CoInitialize(NULL)))
return 0;
........
::CoUninitialize();
return 0;
}