Type Definition windows_sys::Win32::Devices::Fax::PFAX_SERVICE_CALLBACK

pub type PFAX_SERVICE_CALLBACK = Option<unsafe extern "system" fn(faxhandle: HANDLE, deviceid: u32, param1: usize, param2: usize, param3: usize) -> BOOL>;

Required features: "Win32_Devices_Fax", "Win32_Foundation"