Define/Call function in Dataset

Hello Expert,

I have created one function which written a value. This function I wan to set in dataset.
Can  we call/Define function like expression in Dataset ?
If yes then how to write ? I tried following but it did not work

Pproperty ('!!function()')

Hello Expert,

I have created one function which written a value. This function I wan to set in dataset.
Can  we call/Define function like expression in Dataset ?
If yes then how to write ? I tried following but it did not work

Pproperty ('!!function()')