请高手指点迷津,线程问题

Question

例程如下:主程序中,
全局变量
int Start=0;
HANDLE ToKillScanLanHandle;
HANDLE NewhEvent;//自动事件                    自动   无信号 事件名
NewhEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
启动一线程CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)(ReadyToKillHandle),NULL,0,&dw);
DWORD WINAPI ReadyToKillHandle(LPVOID code)
{

again:
WaitForSingleObject(NewhEvent,INFINITE); Sleep(3);
if(ToKillHandle!=NULL)
CloseHandle(ToKillScanLanHandle); goto again;
}定义一定时器
timeSetEvent(100,1,(LPTIMECALLBACK)TimerCallProc,0,TIME_PERIODIC|TIME_CALLBACK_FUNCTION);
void CALLBACK TimerCallProc(UINT uTimerID, UINT uTimerMsg, DWORD dwTimerPointer,DWORD dwReserved1, DWORD dwReserved2)
{
DWORD ID=0;
ToKillHandle=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)(Scan_1),(void*)&Start,0,&ID);
Start+=1;}
void Scan_1(void *p)
{
DWORD ID=0;
HANDLE h_scan; h_scan=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)(Scan_2),(void*)&number,0,&ID);
WaitForSingleObject(h_scan,25);//WAIT_OBJECT_0)
CloseHandle(h_scan);  SetEvent(NewhEvent); _endthread(); return;
}
void Scan_2(void *p){ Sleep(5000);
_endthread(); return;}程序看起来什么问题都没有，为什么运行时只要不打开其它窗口，本程序的句柄不会增加，但一旦打开其它进程，如IE，句柄数会越来越多呢

Answer 1

ToKillScanLanHandle
只看到关闭，没看到打开

Answer 2

对不起,上面有句错了ToKillScanLanHandle=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)(Scan_1),(void*)&Start,0,&ID);
但我估计是CreateThread这个函数的问题

Answer 3

The thread object remains in the system until the thread has terminated and all handles to it are closed through a call to CloseHandle. 
定时器里创建线程，没有CloseHandle.

Answer 4

不想在定时器里关闭，在
DWORD WINAPI ReadyToKillHandle(LPVOID code)
{again:
WaitForSingleObject(NewhEvent,INFINITE);Sleep(3); 
if(ToKillHandle!=NULL)
CloseHandle(ToKillScanLanHandle);goto again;
}

Answer 5

again:
WaitForSingleObject(NewhEvent,INFINITE);Sleep(3);
if(ToKillHandle!=NULL)
CloseHandle(ToKillScanLanHandle);goto again;
为什么不用循环，用goto? 

Answer 6

在这种情况下，用循环和goto一样

Answer 7

WaitForSingleObject(h_scan,25);//WAIT_OBJECT_0) 改成：WaitForSingleObject(h_scan,INFINITE);试试

Answer 8

问题出在同步上,
CloseHandle(ToKillHandle);
此ToKillHandle的值并不一定是
ToKillHandle=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)(Scan_1),(void*)&Start,0,&ID);的值这就难了，这两个线程根本无法保证ToKillHandle的值是一致的