HANDLE  CreateThread(
      LPSECURITY_ATTRIBUTES  lpThreadAttributes,  //  SD
      DWORD  dwStackSize,                                                //  initial  stack  size
      LPTHREAD_START_ROUTINE  lpStartAddress,        //  thread  function
      LPVOID  lpParameter,                                              //  thread  argument
      DWORD  dwCreationFlags,                                        //  creation  option
      LPDWORD  lpThreadId                                                //  thread  identifier
  );用来返回创建的线程的ID号
如果是创建的消息队列的话你就可以用
PostThreadMessage()向它发送消息