Visual C++挖金子设计实现的源代码

				#ifndef __MYCLOCK
				#define __MYCLOCK
				
				#include "stdio.h"
				
				class MYCLOCK
				{
				public:
					HWND hWnd;
					HDC hDC;
					int iNum;
					int iNumShow;
					int iElapse;
					int iIsActive;
				
					MYCLOCK()
					{
						iNum=0;
						iIsActive=0;
						iNumShow=0;
						iElapse=100;
					}
					~MYCLOCK()
					{
						Destroy();
					}
				
					void Begin(HWND hw,int elapse,int timetotal)
					{
						if(iIsActive)
							return;//已经启动了，直接返回
				
						hWnd=hw;
						iElapse=elapse;
				
						SetTimer(hWnd,1,iElapse,NULL);
						iNum=1000/iElapse;
						iNumShow=timetotal;
						iIsActive=1;
					}
					void Destroy()
					{
						if(iIsActive)
						{
							iIsActive=0;
							KillTimer(hWnd,1);
						}
					}
					void SetDC(HDC h)
					{
						hDC=h;
					}
					void Show()
					{
						char temp[20]={0};
				
						sprintf(temp,"TIME: %d  ",iNumShow);
						TextOut(hDC,450,20,temp,strlen(temp));
					}
					int Dec()
					{
						iNum--;
						if(iNum						{
							//过了一秒
							iNum=1000/iElapse;
							iNumShow--;
							if(iNumShow							{
								iNumShow=0;
								Destroy();
								return 1;
							}
						}
						return 0;
					}	
				};
				
				
				#endif