Simple Empty Window

#include <windows.h>
bool done;
HWND test;
LRESULT CALLBACK Proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	if (msg == WM_DESTROY)
	{
		PostQuitMessage(0);
		done = true;
	}
	return (DefWindowProc(hwnd, msg, wParam, lParam));
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	WNDCLASSEX wc;
	MSG msg;
	wc.cbSize = sizeof(WNDCLASSEX);
	wc.style = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc = (WNDPROC)Proc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = hInstance;
	wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wc.hCursor = LoadCursor(NULL,IDC_ARROW);
	wc.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE);
	wc.lpszClassName = "LaClass";
	wc.lpszMenuName = 0;
	RegisterClassEx(&wc);
	test = CreateWindowEx(NULL, "LaClass", "Our First Window", WS_VISIBLE | WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
	while(!done)
	{
		if (GetMessage(&msg,0,0,0))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
	return WPARAM(msg.wParam);
}