GetExitCodeThread判断线程是否执行完

int main(){    HANDLE hThrd1;    HANDLE hThrd2;    DWORD exitCode1 = 0;    DWORD exitCode2 = 0;    DWORD threadId;        hThrd1 = CreateThread(NULL,        0,        ThreadFunc,        (LPVOID)1,        0,        &threadId );    if (hThrd1)        printf("Thread 1 launched/n");    hThrd2 = CreateThread(NULL,        0,        ThreadFunc,        (LPVOID)2,        0,        &threadId );    if (hThrd2)        printf("Thread 2 launched/n");    for (;;)    {        printf("Press any key to exit../n");        getch();        GetExitCodeThread(hThrd1, &exitCode1);        GetExitCodeThread(hThrd2, &exitCode2);        if ( exitCode1 == STILL_ACTIVE )            puts("Thread 1 is still running!");        if ( exitCode2 == STILL_ACTIVE )            puts("Thread 2 is still running!");        if ( exitCode1 != STILL_ACTIVE            && exitCode2 != STILL_ACTIVE )            break;    }    CloseHandle(hThrd1);    CloseHandle(hThrd2);    printf("Thread 1 returned %d/n", exitCode1);    printf("Thread 2 returned %d/n", exitCode2);    return EXIT_SUCCESS;}DWORD WINAPI ThreadFunc(LPVOID n){    Sleep((DWORD)n*1000*2);    return (DWORD)n * 10;}

BOOL GetExitCodeThread( 

HANDLE hThread, 

LPDWORD lpExitCode

); 

返回值：TRUE：执行成功，FALSE：执行失败

hThread:需要判断的线程句柄

lpExitCode：执行成功时，存放线程的状态码，如果是线程的返回值，表示线程执行完，

如果线程没执行完，返回STILL_ACTIVE,如果线程的返回值就是STILL_ACTIVE，就无法判断