Function windows_sys::Win32::Networking::WinInet::InternetQueryDataAvailable

pub unsafe extern "system" fn InternetQueryDataAvailable(
    hfile: *const c_void, 
    lpdwnumberofbytesavailable: *mut u32, 
    dwflags: u32, 
    dwcontext: usize
) -> BOOL

Required features: "Win32_Networking_WinInet", "Win32_Foundation"