程式8-4 CLOCK
CLOCK.C
/*---------------------------------------------------------------------------
CLOCK.C -- Analog Clock Program
(c) Charles Petzold, 1998
---------------------------------------------------------------------------*/
#include <windows.h>
#include <math.h>
#define ID_TIMER 1
#define TWOPI (2 * 3.14159)
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain ( HINSTANCE hInstance, HINSTANCE hPrevInstance,