Drawing a rectangle PROBLEM !!!

[opProgrammer]

Hello, before I explain my problem I just wanted to say that I am quiet new to the programming.

I'll be quick and just describe the problem really briefly, I am attempting to create simple rectangle ( square ) on win32 application. I am using CodeBlocks and I have included the gdi32 and opengl32 library in build options.

However when I try to create rectangle using this function:

#include <snake.hpp>
#include "intro_state.hpp"
#include <windows.h>
#include <vector>

void drawRectangle(Pen* pen, int x, int y, int width, int height)
{
    Pen greenPen = new Pen(Color.Green, 3);
    int x = 20;
    int y = 20;
    int width = 200;
    int height = 200;

    // Draw rectangle to screen
    drawRectangle(greenPen, x, y, width, height)
}

I get this error:

..\..\inc\snake.hpp|13|error: 'Pen' has not been declared|
||=== Build finished: 1 errors, 0 warnings (0 minutes, 0 seconds) ===|

My header file for this particular function:

#ifndef _LEVEL_HPP_
#define _LEVEL_HPP_

#include <intro_state.hpp>
#include <vector>
#include <windows.h>
#include <sstream>
#include <string>

class Snake
{
public:
    void drawRectangle(Pen pen, int x, int y, int width, int height);
};

#endif // _LEVEL_HPP_ 

I really hope you guys can help me! I'd really appreciate it.
Thank you

[welsh4evr]

well i'm not sure on rectangles (havn't drawn one in a while) but this is what i use to draw a filled ball

private: System::Void Form1_Paint(System::Object^  sender, System::Windows::Forms::PaintEventArgs^  e) {
			
			 Graphics^ g = e->Graphics;
  Graphics^ g1 = e->Graphics;
     //create an ellipse with
     //  Black color
     //  start position = (10, 550) (start position is always Top Left of the object)
     //  width = 25 px, height = 25 px
  
		 g->SmoothingMode = Drawing2D::SmoothingMode::HighQuality;
	g->FillEllipse(Brushes::Red, circlePos.X, circlePos.Y, 25, 25);
	g->DrawEllipse(Pens::Black, circlePos.X, circlePos.Y, 25, 25);

	
		 }

okay yea so to draw a rectangle you use

private: System::Void Form1_Paint(System::Object^  sender, System::Windows::Forms::PaintEventArgs^  e) {
// Paint event
Graphics^ g = e->Graphics;
//create class of g taking from Graphics class

int x = 20;
int y = 20;
Width = 200;
Height = 200;

g->DrawRectangle(Pens::Green, x, y, Width, Height;
} 

This will draw a rectangle with size 20x20 at position 200x200 on screen


O btw the reason your getting the error 'Pen is not declared' is because the class is called 'Pens' not Pen. you have to be very exact in c++ especially if you don't have an intellisense library or the equivalent to your compiler

[opProgrammer]

Erhmm, isn't that an example for forms? I am creating a snake game on client window (win32).

What I forgot to mention is that we have been provided with own library which include <windows.h> library. Correct me if Im wrong but doesn't Graphics^ @ line 3 belong to <graphics.h> library?

And lastly, I think you just got mixed on the last part. I think it draws a rectangle at position (20,20) of (200, 200 ) dimensions. And again please correct me if Im wrong.

Anyway, do u mind providing an example from <windows.h> library?

Any help will be greatly appreciated,
Thanks.

[welsh4evr]

Ahh yes sorry I do apologize I must have skipped over the win32 application part my bad. I'm on my phone atm so can't give a code example but I will have alook as soon as I get on my pc if noone else replies by then.

Sorry for the misunderstanding.

[opProgrammer]

: )
Don't worry about it.