HowTo display the sort icon of a DataGridColumn(-Header) without sorting it ?

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WPF

sorting

DataGrid

Hi commmmmmunity :)

I have a WPF DataGrid. There are Two Columns. Column A is visible, Column B isnt.

I've implement some code that does the following:
By clicking into the header Of Column A, the datagrid get sorted by Column B.

But, as said, Column B isnt visible. maybe the User doesnt know that there were an sorting-process.To provide this I want to display the icon of the current SortingDirection of Column B on COlumn A.

How can i Do that ?

Jeff