urgent help needed win32 c++ code , please help me!!!!

The following code handles message from ------

Code:

---

MSG msg;
while (GetMessage (&msg, NULL, 0 ,0))
{

IsDialogMessage (hwndDialog, &msg);
}

---

a) MessageBox
b) Model dialog box
c) Modelless dialog box
d) any dialog

i guess answer is c)..pls correct me if am wrong