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#include <Windows.h>

LRESULT CALLBACK GLWindowProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
	switch (msg)
	{
	case WM_CLOSE:
		PostQuitMessage(0);
		break;
	default:
		break;
	}

	return DefWindowProc(hwnd,msg,wParam,lParam);
}


INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance,_In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
	//register class
	WNDCLASSEX wndclass;
	wndclass.cbClsExtra = 0;
	wndclass.cbSize = sizeof(WNDCLASSEX);
	wndclass.cbWndExtra = 0;
	wndclass.hbrBackground = NULL;
	wndclass.hCursor = NULL;
	wndclass.hIcon = NULL;
	wndclass.hIconSm = NULL;
	wndclass.hInstance = hInstance;
	wndclass.lpfnWndProc = GLWindowProc;
	wndclass.lpszClassName = L"GLWindow";
	wndclass.lpszMenuName = NULL;
	wndclass.style = CS_VREDRAW | CS_HREDRAW;

	ATOM atom = RegisterClassEx(&wndclass);
	if (!atom)
		return 0;

	//create window
	HWND hwnd = CreateWindowEx(NULL,L"GLWindow",L"OpwnGL Window",WS_OVERLAPPEDWINDOW,100,100,800,600,NULL,NULL,hInstance,NULL);

	//show Window
	ShowWindow(hwnd,SW_SHOW);
	UpdateWindow(hwnd);

	MSG msg;
	while (true)
	{
		if (PeekMessage(&msg, NULL, NULL, NULL, PM_REMOVE))
		{
			if (msg.message == WM_QUIT)
				break;
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		//draw scene


	}

	return 0;
}