public int wkhtmltopdf_set_progress_changed_callback(IntPtr converter, [MarshalAs(UnmanagedType.FunctionPtr)] VoidCallback callback) => WkHtmlToXBindings.wkhtmltopdf_set_progress_changed_callback(converter, callback);
public int SetProgressChangedCallback(IntPtr converter, VoidCallback callback) { return(WkHtmlToXBindings.wkhtmltopdf_set_progress_changed_callback(converter, callback)); }