Thread: Help with Class Library .NET and Classes :0

Hey there, just wondering if anyone could tell me where I can go to learn about using classes in external files (how to link them) and if anyone has a link to download a sample Windows Forms project using dll's (nothing specific, just a basic idea of how it all works together).

thanks,

Rob

------> Below added November 27th

Ok, here's what I'm playing around with:

<<This is a VC++ Windows Forms .NET project>>

My CMainDLL.cpp reads:

Code:

// This is the main DLL file.
#include "stdafx.h"
#include "CMainDLL.h"

And my CMainDLL.h reads:

Code:

// CMainDLL.h

#pragma once

using namespace System;

namespace CMainDLL
{
	public __gc class Class1
	{
		// TODO: Add your methods for this class here.
	public:
		double trouble;
		double dare;
	};
}

I'm just seeing if I can use (for now until I get better at it) these stupid little things:

Form1.h reads:

Code:

#pragma once
#using "CMainDLL.dll"
namespace CMain
{
	
	//using CMainDLL::Class1;
	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
	///
	/// WARNING: If you change the name of this class, you will need to change the 
	///          'Resource File Name' property for the managed resource compiler tool 
	///          associated with all .resx files this class depends on.  Otherwise,
	///          the designers will not be able to interact properly with localized
	///          resources associated with this form.
	/// </summary>
public __gc class Form1 : public System::Windows::Forms::Form
	{	
	public:
		Form1(void)
		{
			InitializeComponent();
		}
  
	protected:
		void Dispose(Boolean disposing)
		{
			if (disposing && components)
			{
				components->Dispose();
			}
			__super::Dispose(disposing);
		}
	private: System::Windows::Forms::Button *  button1;

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

		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->button1 = new System::Windows::Forms::Button();
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(112, 216);
			this->button1->Name = S"button1";
			this->button1->TabIndex = 0;
			this->button1->Text = S"button1";
			this->button1->Click += new System::EventHandler(this, button1_Click);
			// 
			// Form1
			// 
			this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
			this->ClientSize = System::Drawing::Size(292, 266);
			this->Controls->Add(this->button1);
			this->Name = S"Form1";
			this->Text = S"Form1";
			this->ResumeLayout(false);

		}	


	private: System::Void button1_Click(System::Object *  sender, System::EventArgs *  e)
			 {	
//
//Something like this, obviously it's not finished, just an example:
//
				 CMainDLL::Class1 Rob;
				 Rob.dare = 23.3;

			 }

	};
}

and Form1.cpp reads:

Code:

#include "stdafx.h"
#include "Form1.h"
#include <windows.h>

using namespace CMain;

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
	System::Threading::Thread::CurrentThread->ApartmentState = System::Threading::ApartmentState::STA;
	Application::Run(new Form1());
	return 0;
}

When I compile my error reads:
error C2262: 'Rob': cannot be destroyed.

Seems like a lot of code to go through above...

Sure would be nice to be able to use the same code over and over instead of having to re-write it every time I add a new .cpp!

Is there a link somewhere that can teach me how to do this?

Thanks,

Rob Sitter.