Function winapi::um::wininet::InternetOpenUrlA

pub unsafe extern "system" fn InternetOpenUrlA(
    hInternet: HINTERNET, 
    lpszUrl: LPCSTR, 
    lpszHeaders: LPCSTR, 
    dwHeadersLength: DWORD, 
    dwFlags: DWORD, 
    dwContext: DWORD_PTR
) -> HINTERNET