Function winapi::um::winhttp::WinHttpOpen

pub unsafe extern "system" fn WinHttpOpen(
    pszAgentW: LPCWSTR, 
    dwAccessType: DWORD, 
    pszProxyW: LPCWSTR, 
    pszProxyBypassW: LPCWSTR, 
    dwFlags: DWORD
) -> HINTERNET