public string CombineURL(string url = "")
{
IntPtr buffer = PInvokeUtils.NativeUtf16FromString(url, 2048);
var res = _api.SciterCombineURL(_he, buffer, 2048);
string s = PInvokeUtils.StringFromNativeUtf16(buffer);
PInvokeUtils.NativeUtf16FromString_FreeBuffer(buffer);
return(s);
}