Getting a part of bytes

The title is vague and may be wrong but I am using the SetStyle and GetStyle function in the Win32 API and the GetStyle returns the style bytes. I want to know how you tell if (lets say) WS_VISIBLE is part of those bytes returned by GetStyle.

Code:

---

if (GetStyle() & WS_VISIBLE)
{

}

---

ok so how do I tell if it isn't in there, I tried !& and !GetStyle() & style but neither seemed to work.

(GetStyle() & WS_VISIBLE) == 0

or

!(GetStyle() & WS_VISIBLE)

Operator precedence matters.

ok thank you