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#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>

float angle = 0.0f;
HDC g_hDC;

void SetupPixelFormat(HDC hDC)
{
	int nPixelFormat;

	static PIXELFORMATDESCRIPTOR pfd = {
		sizeof(PIXELFORMATDESCRIPTOR),
		1,
		PFD_DRAW_TO_WINDOW |
		PFD_SUPPORT_OPENGL |
		PFD_DOUBLEBUFFER,
		PFD_TYPE_RGBA,
		32,
		0,0,0,0,0,0,
		0,
		0,
		0,
		0,0,0,0,
		16,
		0,
		0,
		PFD_MAIN_PLANE,
		0,
		0,0,0};

	nPixelFormat = ChoosePixelFormat(hDC, &pfd);

	SetPixelFormat(hDC,nPixelFormat,&pfd);
}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
	static HGLRC hRC;
	static HDC hDC;
	char string[] = "Hello, World";
	int width,height;

	switch(message)
	{
	case WM_CREATE:

		hDC = GetDC(hwnd);
		g_hDC = hDC;
		SetupPixelFormat(hDC);

		hRC = wglCreateContext(hDC);
		wglMakeCurrent(hDC,hRC);

		return 0;
		break;

	case WM_CLOSE:

		wglMakeCurrent(hDC,hRC);
		wglDeleteContext(hRC);

		PostQuitMessage(0);

		return 0;
		break;

	case WM_SIZE:

		height = HIWORD(lParam);
		width = LOWORD(lParam);

		if (height == 0)
			height = 1;

		glViewport(0,0,width,height);
		glMatrixMode(GL_PROJECTION);
		glLoadIdentity();

		gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,1.0f,1000.0f);

		glMatrixMode(GL_MODELVIEW);
		glLoadIdentity();

		return 0;
		break;
	}
	return (DefWindowProc(hwnd,message,wParam,lParam));
}

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	WNDCLASSEX wc;
	HWND hwnd;
	MSG msg;
	bool done;

	wc.cbSize = sizeof(WNDCLASSEX);
	wc.style = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc = WndProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = hInstance;
	wc.hIcon = LoadIcon(NULL,IDI_APPLICATION);
	wc.hCursor = LoadCursor(NULL,IDC_ARROW);
	wc.hbrBackground = NULL;
	wc.lpszMenuName = NULL;
	wc.lpszClassName = "MyClass";
	wc.hIconSm = LoadIcon(NULL,IDI_WINLOGO);

	if(!RegisterClassEx(&wc))
		return 0;

	hwnd = CreateWindowEx(NULL,
		"MyClass",
		"The OpenGL Window Application",
		WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_SYSMENU | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
		100, 100,
		400, 400,
		NULL,
		NULL,
		hInstance,
		NULL);

	if(!hwnd)
		return 0;

	done = false;

	while(!done)
	{
		PeekMessage(&msg,hwnd,NULL,NULL,PM_REMOVE);

		if(msg.message == WM_QUIT)
		{
			done = true;
		}
		else
		{
			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
			glLoadIdentity();

			angle = angle + 0.1f;
			if (angle > 360)
				angle = 0;
			glTranslatef(0.0f,0.0f,-5.0f);
			glRotatef(angle,0.0f,0.0f,1.0f);

			glColor3f(1.0f,0.0f,0.0f);
			glBegin(GL_TRIANGLES);
				glVertex3f(0.0f,0.0f,0.0f);
				glVertex3f(1.0f,0.0f,0.0f);
				glVertex3f(1.0f,1.0f,0.0f);
			glEnd();

			SwapBuffers(g_hDC);

			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
	return msg.wParam;
}

------ Build started: Project: Starting OpenGL, Configuration: Debug Win32 ------
Compiling...
main.cpp
Linking...
main.obj : error LNK2019: unresolved external symbol _gluPerspective@32 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__glLoadIdentity@0 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__glMatrixMode@4 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__glViewport@16 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__wglDeleteContext@4 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__wglMakeCurrent@8 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__wglCreateContext@4 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
main.obj : error LNK2019: unresolved external symbol __imp__glEnd@0 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__glVertex3f@12 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__glBegin@4 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__glColor3f@12 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__glRotatef@16 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__glTranslatef@12 referenced in function _WinMain@16
main.obj : error LNK2019: unresolved external symbol __imp__glClear@4 referenced in function _WinMain@16
G:\C++\Starting OpenGL\Debug\Starting OpenGL.exe : fatal error LNK1120: 14 unresolved externals
Build log was saved at "file://g:\C++\Starting OpenGL\Starting OpenGL\Debug\BuildLog.htm"
Starting OpenGL - 15 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========