#include <windows.h>

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

void guitest(HMODULE hInstance, int nCmdShow)
{
	MSG  msg;    
	HWND hwnd;
	WNDCLASSW wc;

	wc.style         = CS_HREDRAW | CS_VREDRAW;
	wc.cbClsExtra    = 0;
	wc.cbWndExtra    = 0;
	wc.lpszClassName = L"Window";
	wc.hInstance     = hInstance;
	wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
	wc.lpszMenuName  = NULL;
	wc.lpfnWndProc   = WndProc;
	wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
	wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);

	RegisterClassW(&wc);
	hwnd = CreateWindowW( wc.lpszClassName, L"Window",
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,
		100, 100, 350, 250, NULL, NULL, hInstance, NULL);  

	ShowWindow(hwnd, nCmdShow);
	UpdateWindow(hwnd);

	while( GetMessage(&msg, NULL, 0, 0)) {
		DispatchMessage(&msg);
	}
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch(msg)
	{
		case WM_DESTROY:
			PostQuitMessage(0);
			return 0;      
	}

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