problem combining forms in visual c++ with opencv

I've taught myself basic opencv functionality and I've taught myself how to create forms using visual c++, but I can't merge the two.

At the moment, all I'm trying to do is write a program that creates a form with a single button "display image" which when pressed, gets opencv to open an image.

The problem I get is when I include open cv libraries

#include <cv.h>
#include <cxcore.h>
#include <highgui.h>

in the following code (code for the forms)

Code:

 // Opencv_helloworld.cpp : main project file.

#include "stdafx.h"
#include "Form1.h"


using namespace Opencv_helloworld;

[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
	// Enabling Windows XP visual effects before any controls are created
	Application::EnableVisualStyles();
	Application::SetCompatibleTextRenderingDefault(false); 

	// Create the main window and run it
	Application::Run(gcnew Form1());
	return 0;
}

Form1.h:

Code:

#pragma once

namespace Opencv_helloworld {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for Form1
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^  button1;
	protected: 

	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(93, 112);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(108, 23);
			this->button1->TabIndex = 0;
			this->button1->Text = L"Display Image";
			this->button1->UseVisualStyleBackColor = true;
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(284, 262);
			this->Controls->Add(this->button1);
			this->Name = L"Form1";
			this->Text = L"Form1";
			this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
			this->ResumeLayout(false);

		}
#pragma endregion
	private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
			 }
	};
}

When I run this, the form appears with the button (although pressing it doesn't do anything, obviously). As soon as I try to add the opencv libraries I get the following errors:

1>------ Build started: Project: Opencv_helloworld, Configuration: Debug Win32 ------
1> Opencv_helloworld.cpp
1>c:\programdata\opencv2.2\include\opencv2\core\op erations.hpp(81): warning C4793: '`anonymous namespace'::CV_XADD' : function compiled as native :
1> Inline native assembly not supported in managed code
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::setSVMDetector(class std::vector<float,class std::allocator<float> > const &)" (?setSVMDetector@HOGDescriptor@cv@@UAEXABV?$vector @MV?$allocator@M@std@@@std@@@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall cv::HOGDescriptor::read(class cv::FileNode &)" (?read@HOGDescriptor@cv@@UAE_NAAVFileNode@2@@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::write(class cv::FileStorage &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)const " (?write@HOGDescriptor@cv@@UBEXAAVFileStorage@2@ABV ?$basic_string@DU?$char_traits@D@std@@V?$allocator @D@2@@std@@@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall cv::HOGDescriptor::load(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?load@HOGDescriptor@cv@@UAE_NABV?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@0@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::save(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)const " (?save@HOGDescriptor@cv@@UBEXABV?$basic_string@DU? $char_traits@D@std@@V?$allocator@D@2@@std@@0@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::copyTo(struct cv::HOGDescriptor &)const " (?copyTo@HOGDescriptor@cv@@UBEXAAU12@@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::compute(class cv::Mat const &,class std::vector<float,class std::allocator<float> > &,class cv::Size_<int>,class cv::Size_<int>,class std::vector<class cv::Point_<int>,class std::allocator<class cv::Point_<int> > > const &)const " (?compute@HOGDescriptor@cv@@UBEXABVMat@2@AAV?$vect or@MV?$allocator@M@std@@@std@@V?$Size_@H@2@2ABV?$v ector@V?$Point_@H@cv@@V?$allocator@V?$Point_@H@cv@ @@std@@@5@@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::detect(class cv::Mat const &,class std::vector<class cv::Point_<int>,class std::allocator<class cv::Point_<int> > > &,double,class cv::Size_<int>,class cv::Size_<int>,class std::vector<class cv::Point_<int>,class std::allocator<class cv::Point_<int> > > const &)const " (?detect@HOGDescriptor@cv@@UBEXABVMat@2@AAV?$vecto r@V?$Point_@H@cv@@V?$allocator@V?$Point_@H@cv@@@st d@@@std@@NV?$Size_@H@2@2ABV45@@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::detectMultiScale(class cv::Mat const &,class std::vector<class cv::Rect_<int>,class std::allocator<class cv::Rect_<int> > > &,double,class cv::Size_<int>,class cv::Size_<int>,double,int)const " (?detectMultiScale@HOGDescriptor@cv@@UBEXABVMat@2@ AAV?$vector@V?$Rect_@H@cv@@V?$allocator@V?$Rect_@H @cv@@@std@@@std@@NV?$Size_@H@2@2NH@Z)
1>Opencv_helloworld.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall cv::HOGDescriptor::computeGradient(class cv::Mat const &,class cv::Mat &,class cv::Mat &,class cv::Size_<int>,class cv::Size_<int>)const " (?computeGradient@HOGDescriptor@cv@@UBEXABVMat@2@A AV32@1V?$Size_@H@2@2@Z)
1>d:\documents\visual studio 2010\Projects\Opencv_helloworld\Debug\Opencv_hello world.exe : fatal error LNK1120: 10 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========


What am I doing wrong?

I have exactly the same Problem! Could you find a solution?

Thx for help..

Robert

I think, it is linker problem:

Add these entries on Additional Dependencies option (for debug configuration):

* C:\Program Files\OpenCV2.2\lib\opencv_core220d.lib
* C:\Program Files\OpenCV2.2\lib\opencv_highgui220d.lib
* C:\Program Files\OpenCV2.2\lib\opencv_video220d.lib
* C:\Program Files\OpenCV2.2\lib\opencv_ml220d.lib
* C:\Program Files\OpenCV2.2\lib\opencv_legacy220d.lib
* C:\Program Files\OpenCV2.2\lib\opencv_imgproc220d.lib

You need to eliminate ending d for release build.
Consult here: VisualC++ - OpenCV Wiki

Forms are not available in C++. They are part of Managed C++ or C++/CLI.