Type Definition windows_sys::Win32::System::AddressBook::LPFNBUTTON

pub type LPFNBUTTON = Option<unsafe extern "system" fn(uluiparam: usize, lpvcontext: *mut c_void, cbentryid: u32, lpselection: *mut ENTRYID, ulflags: u32) -> i32>;

Required features: "Win32_System_AddressBook"