Function winapi::um::wininet::HttpSendRequestExW

pub unsafe extern "system" fn HttpSendRequestExW(
    hRequest: HINTERNET, 
    lpBuffersIn: LPINTERNET_BUFFERSW, 
    lpBuffersOut: LPINTERNET_BUFFERSW, 
    dwFlags: DWORD, 
    dwContext: DWORD_PTR
) -> BOOL