Create Window

I am using the CreateWindow API Function to create a button.The problem is that the button has a title bar.How do i make it a "real" buttton with no title bar.I have tried all window styles but it doesn't work.

Code:

---

b = CreateWindow(
                    "BUTTON",
                    "Click!",
                    BS_PUSHBUTTON,
                    0,
                    0,
                    20,
                    60,
                    NULL,
                    NULL,
                    NULL,
                    NULL
                    );
ShowWindow(b,1);

---

The code is in C++ but that doesn't change anything.

No help needed any more.I solved the problem.