#pragma comment(lib, "opengl32.lib")
#pragma comment(lib, "glu32.lib")#include <windows.h>// C RunTime Header Files
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#include <gl/GL.h>
#include <gl/GLU.h>HWND    hWnd;
HDC     hDC;
HGLRC   hRC;void Game_Init();
void Game_Main();
void Game_ShutDown(); // Set up pixel format for graphics initialization
void SetupPixelFormat()
{PIXELFORMATDESCRIPTOR pfd, *ppfd;int pixelformat;ppfd = &pfd;ppfd->nSize = sizeof(PIXELFORMATDESCRIPTOR);ppfd->nVersion = 1;ppfd->dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;ppfd->dwLayerMask = PFD_MAIN_PLANE;ppfd->iPixelType = PFD_TYPE_COLORINDEX;ppfd->cColorBits = 16;ppfd->cDepthBits = 16;ppfd->cAccumBits = 0;ppfd->cStencilBits = 0;pixelformat = ChoosePixelFormat(hDC, ppfd);SetPixelFormat(hDC, pixelformat, ppfd);
}// Initialize OpenGL graphics
void InitGraphics()
{hDC = GetDC(hWnd);SetupPixelFormat();hRC = wglCreateContext(hDC);wglMakeCurrent(hDC, hRC);glClearColor(0, 0, 0, 0.5);glClearDepth(1.0);glEnable(GL_DEPTH_TEST);
}// Resize graphics to fit window
void ResizeGraphics()
{// Get new window size
    RECT rect;int width, height;GLfloat aspect;GetClientRect(hWnd, &rect);width = rect.right;height = rect.bottom;aspect = (GLfloat)width / height;// Adjust graphics to window sizeglViewport(0, 0, width, height);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0, aspect, 1.0, 100.0);glMatrixMode(GL_MODELVIEW);
}// Draw frame
void DrawGraphics()
{glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);// Set location in front of camera
    glLoadIdentity();glTranslated(0, 0, -10);// Draw a square
    glBegin(GL_QUADS);glColor3d(1, 0, 0);glVertex3d(-2, 2, 0);glVertex3d(2, 2, 0);glVertex3d(2, -2, 0);glVertex3d(-2, -2, 0);glEnd();// Show the new scene
    SwapBuffers(hDC);
}// Handle window events and messages
LONG WINAPI MainWndProc (HWND hWnd, UINT uMsg, WPARAM  wParam, LPARAM  lParam)
{switch (uMsg){case WM_SIZE:ResizeGraphics();break;case WM_CLOSE:DestroyWindow(hWnd);break;case WM_DESTROY:PostQuitMessage(0);break;// Default event handlerdefault:return DefWindowProc (hWnd, uMsg, wParam, lParam);break;}return 1;
}int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{const LPCWSTR appname = TEXT("OpenGL Sample");WNDCLASS wndclass;MSG      msg;// Define the window classwndclass.style         = 0;wndclass.lpfnWndProc   = (WNDPROC)MainWndProc;wndclass.cbClsExtra    = 0;wndclass.cbWndExtra    = 0;wndclass.hInstance     = hInstance;wndclass.hIcon         = LoadIcon(hInstance, appname);wndclass.hCursor       = LoadCursor(NULL,IDC_ARROW);wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);wndclass.lpszMenuName  = appname;wndclass.lpszClassName = appname;// Register the window classif (!RegisterClass(&wndclass)) return FALSE;// Create the windowhWnd = CreateWindow(appname,appname,WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT
,CW_USEDEFAULT
,NULL,NULL,hInstance,NULL);if (!hWnd) return FALSE;// Initialize OpenGL
    InitGraphics();// Display the window
    ShowWindow(hWnd, nCmdShow);UpdateWindow(hWnd);// Event loopwhile (1){if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) == TRUE){if (!GetMessage(&msg, NULL, 0, 0)) return TRUE;TranslateMessage(&msg);DispatchMessage(&msg);}DrawGraphics();}wglDeleteContext(hRC);ReleaseDC(hWnd, hDC);
}