Problem med OpenGL

Hej. Jeg får ikke sat noget på på skærmen, når jeg bruger glVertex kaldene. Kan I se, hvad der er galt?

main.cpp (sikkert ikke relevant):

#include <windows.h>
#include "wndproc.h"

int WINAPI WinMain (HINSTANCE Instance, HINSTANCE, PSTR, int) {
	WNDCLASSEX wcl;
	memset (&wcl, 0, sizeof (wcl));
	wcl.cbSize			= sizeof (WNDCLASSEX);
	wcl.cbClsExtra		= 0;
	wcl.cbWndExtra		= 0;
	wcl.hInstance		= Instance;
	wcl.hIcon			= LoadIcon (NULL, IDI_APPLICATION);
	wcl.hIconSm			= LoadIcon (NULL, IDI_APPLICATION);
	wcl.hCursor			= LoadCursor (NULL, IDC_ARROW);
	wcl.hbrBackground	= (HBRUSH) COLOR_BACKGROUND;
	wcl.lpszMenuName	= NULL;
	wcl.lpszClassName	= TEXT ("MAINWINDOW");
	wcl.lpfnWndProc		= WndProc;
	if (!RegisterClassEx (&wcl))
		return 0;

	HWND Window = CreateWindow (
		TEXT ("MAINWINDOW"),
		TEXT ("OpenGL"),
		WS_POPUP,
		0, 0, 0, 0,
		GetDesktopWindow (),
		NULL, Instance, NULL
	);
	ShowCursor (0);
	ShowWindow (Window, SW_SHOWMAXIMIZED);
	UpdateWindow (Window);

	int Run = 1;
	MSG Message;
	while (Run) {
		if (PeekMessage (&Message, NULL, 0, 0, PM_REMOVE) > 0) {
			if (Message.message == WM_QUIT) {
				Run = 0;
				break;
			}
			else {
				TranslateMessage (&Message);
				DispatchMessage (&Message);
			}
		}
	}

	return Message.wParam;
}

opengl.cpp:

#include <windows.h>
#include <gl/gl.h>
#include "opengl.h"

void glEnable (HWND Window, HDC *hdc, HGLRC *hrc) {
	PIXELFORMATDESCRIPTOR pf;
	memset (&pf, 0, sizeof (pf));
	pf.nSize		= sizeof (pf);
	pf.nVersion		= 1;
	pf.cColorBits	= 24;
	pf.cDepthBits	= 16;
	pf.iPixelType	= PFD_TYPE_RGBA;
	pf.iLayerType	= PFD_MAIN_PLANE;
	pf.dwFlags		= PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL;
	int iFormat = ChoosePixelFormat (*hdc, &pf);
	SetPixelFormat (*hdc, iFormat, &pf);
	*hrc = wglCreateContext (*hdc);
	wglMakeCurrent (*hdc, *hrc);
}
void glDisable (HWND Window, HDC *hdc, HGLRC *hrc) {
	wglDeleteContext (*hrc);
	wglMakeCurrent (NULL, NULL);
	ReleaseDC (Window, *hdc);
}
void glRender () {
	glClearColor (0.2f, 0.6f, 0.9f, 0.0f);
	glClear (GL_COLOR_BUFFER_BIT);
	//glPolygonMode (GL_FRONT, GL_LINE);
}
void glDrawScene () {
	glBegin (GL_TRIANGLES);
		glVertex2f (0.5f, 1.0f);
		glVertex2f (0.0f, 0.0f);
		glVertex2f (1.0f, 0.0f);
	glEnd ();
}

opengl.h:

void glEnable (HWND, HDC *, HGLRC *);
void glDisable (HWND, HDC *, HGLRC *);
void glRender ();
void glDrawScene ();

wndproc.cpp:

#include <windows.h>
#include "wndproc.h"
#include "opengl.h"

// Event handlers
void OnKey (int iKey) {
	switch (iKey) {
		case VK_ESCAPE:
			PostQuitMessage (0);
			break;
	}
}

// Device- and rendercontext
HDC		hdc;
HGLRC	hrc;

LRESULT CALLBACK WndProc (HWND Window, UINT Message, WPARAM wParam, LPARAM lParam) {
	switch (Message) {
		case WM_CREATE:
			hdc = GetDC (Window);
			glEnable (Window, &hdc, &hrc);
			SetTimer (Window, 0, 1000, 0);
			break;
		case WM_PAINT:
			glRender ();
			glDrawScene ();
			SwapBuffers (hdc);
			break;
		case WM_KEYDOWN:
			OnKey (wParam);
			break;
		case WM_QUIT:
		case WM_CLOSE:
		case WM_DESTROY:
			glDisable (Window, &hdc, &hrc);
			PostQuitMessage (0);
			break;
		default:
			return DefWindowProc (Window, Message, wParam, lParam);
	}
}

wndproc.h:

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);

// Event handlers
void OnKey (int);

Resultatet er en blå skærm, som jeg sætter den med glClearColor.