C / C++ / MFC

BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpvIgored)
{
   switch (dwReason)
   {
      case DLL_PROCESS_ATTACH:  /* a process is attaching */
         /* some work, start thread if per process  */
         break;

      case DLL_THREAD_ATTACH:  /* a process is attaching */
         /* some work, start thread if per thread  */
         break;

      case DLL_THREAD_DETACH:  /* a process is detaching */
         /* signal thread to end, some work after thread ends, if per thread  */
         break;

      case DLL_PROCESS_DETACH:  /* a process is detaching */
         /* signal thread to end, some work after thread ends, if per process  */
         break;

      default:   /*  undefined value  */
         return FALSE;   /*  Who know's what the calling thread/process is up to  */
   }
   
   return TRUE;
}

/*  inside your thread "main()"  */
while(/*  still running  */)
{
   /*  do work  */
}

SetEvent(/*  event handle for thread */);

return 0;

#define MAX_INFLATE_ITERATIONS  20
#define MAX_BOUNCE_ITERATIONS 3
#define INFLATE_INCR  2
#define INFLATE_SLEEP 5

// ...

CRect  rc;
int i, j;

pMain->GetWindowRect(&rc);

for(j = 0; j < MAX_BOUNCE_ITERATIONS; j++
{
   for(i = 1; i <= MAX_INFLATE_ITERATIONS; i++)
   {
      rc.InflateRect(-INFLATE_INCR, INFLATE_INCR);
      pMain->MoveWindow(&rc, TRUE);
      Sleep(INFLATE_SLEEP);
   }

   for(i = MAX_INFLATE_ITERATIONS; i > 0; i++)
   {
      rc.InflateRect(INFLATE_INCR, -INFLATE_INCR);
      pMain->MoveWindow(&rc, TRUE);
      Sleep(INFLATE_SLEEP);
   }
}

//  assumes m_wndProgress is your window and this is MFC
m_wndProgress.SetRange32(0, nFileSize);  // nFileSize is total size
m_wndProgress.SetPos(0);  // to reset

while(/*  more data to read */)
{
  //  read in some data
  m_wndProgress.SetStep(nReadSize);  // nReadSize is how much you read in
  m_wndProgress.StepIt();
}