Opengl in a c++ .net form builder window

OpenGL
1

Hi guys

I’m using visual c++ 7. I would like to know how to get opengl displaying inside c++ .net form builder window. Basically, I’ve built my gui using the .net wizard and toolbox but now I need to implement an opengl screen in the main part of my program. Any suggestions on how to?

thanks in advance

gm

2

i am guessing you don’t mean opengl in design time…

as such you need to place a panel to be your place holder, then you create your hDC from the window handle of that panel.

i belive it goes something like this:

 
HDC hDC = GetDC(panel->Handle.ToPointer());
3

First thing: I’m rather new to c++. Got working with OpenGL recently but didn’t do much more than the stuff in DrawScene. Now I need to make an OpenGL something in a (System::Windows::Forms::Form) in a .Net (2005) created interface of my friend for this school project we’re doing.

So I created a Panel object with the toolbox provided in Visual Studio and got myself

 private: System::Windows::Forms::Panel^  panel1;

So far I haven’t messed with the by VS created header file, which is:

#pragma once

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


namespace RoboGenSim
{
	/// <summary> 
	/// Summary for OpenGLWindow
	///
	/// 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 ref class OpenGLWindow : public System::Windows::Forms::Form
	{
	public: 
		OpenGLWindow(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
			//HDC hDC = GetDC( hWnd );
		}
        
	protected: 
		void Dispose(Boolean disposing)
		{
			if (disposing && components)
			{
				components->Dispose();
			}
			__super::Dispose(disposing);
		}
	private: System::Windows::Forms::Panel^  panel1;

	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)
		{
			System::ComponentModel::ComponentResourceManager^  resources = gcnew System::ComponentModel::ComponentResourceManager(typeid<OpenGLWindow >);
			this->panel1 = gcnew System::Windows::Forms::Panel();
			this->SuspendLayout();
			// 
			// panel1
			// 
			this->panel1->Dock = System::Windows::Forms::DockStyle::Fill;
			this->panel1->Location = System::Drawing::Point(0, 0);
			this->panel1->Name = L"panel1";
			this->panel1->Size = System::Drawing::Size(292, 266);
			this->panel1->TabIndex = 0;
			// 
			// OpenGLWindow
			// 
			this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
			this->ClientSize = System::Drawing::Size(292, 266);
			this->Controls->Add(this->panel1);
			this->Icon = (stdcli::language::safe_cast<System::Drawing::Icon^  >(resources->GetObject(L"$this.Icon")));
			this->Name = L"OpenGLWindow";
			this->Text = L"Environment";
			this->ResumeLayout(false);

		}		
#pragma endregion
	};
}

And the cpp file is only:

#include <windows.h>

#include "StdAfx.h"
#include "OpenGLWindow.h"

#include "GL/gl.h"
#include "GL/glu.h"

HDC hDC = GetDC( panel1->Handle.ToPointer() );

But it gives me a lot of errors when I try to build this. So I’m sure I’m forgetting something obvious, for the more experienced programmer at least. Like I forget to include something, I just don’t know.

The errors it gives:

Compiling...
OpenGLWindow.cpp
OpenGLWindow.cpp(10) : error C2146: syntax error : missing ';' before identifier 'hDC'
OpenGLWindow.cpp(10) : error C2501: 'HDC' : missing storage-class or type specifiers
OpenGLWindow.cpp(10) : error C2501: 'hDC' : missing storage-class or type specifiers
OpenGLWindow.cpp(10) : error C2065: 'panel1' : undeclared identifier
OpenGLWindow.cpp(10) : error C2227: left of '->Handle' must point to class/struct/union
        type is ''unknown-type''
OpenGLWindow.cpp(10) : error C2228: left of '.ToPointer' must have class/struct/union/generic type
OpenGLWindow.cpp(10) : error C3861: 'GetDC': identifier not found

I really hope someone can point me in the right direction :slight_smile:
Thanks!!

Dirk

4

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