Is it possible to do a SET of a hex value directly from the Mango GUI?

I explain. I want to make a SET of a data point with the value:
0xFF 0xFF 0x56
where 0xFF are non-printable characters. But if I indicate in the SET field the value: FF FF 56
it sends it to me as if it were a complete string, that is to say literally the values "FF FF 56", I want it to send me the value in hexadecimal, not in ASCII.
I have managed to do it with an intermediate virtual datapoint and then a script that does the conversion from string to hex. But I would like to know if it is possible to do it directly so as not to have to use intermediate conversions.

Thank you.