Type Definition windows_sys::Win32::Networking::WindowsWebServices::WS_PROXY_MESSAGE_CALLBACK

pub type WS_PROXY_MESSAGE_CALLBACK = Option<unsafe extern "system" fn(message: *const WS_MESSAGE, heap: *const WS_HEAP, state: *const c_void, error: *const WS_ERROR) -> HRESULT>;

Required features: "Win32_Networking_WindowsWebServices"