whats wrong with this it should show text depending on time pass but it shows nothing....

static DWORD dwShowTick;

dwShowTick = GetTickCount ();

if (GetTickCount () - dwShowTick == 10000)

{

addMessage("10 sec");

}

else if (GetTickCount () - dwShowTick == 20000) // i also puted > 20000 but still not working

{

addMessage("20 sec");

}