Dynamics AX 4.0 EP Custom Lookup Issue


I am new developer in AX 4.0 and got stuck at one point.

I need to create a lookup page on EP which can display country ID and country Name (As shown in screen shot) with filter.

But the filter is by default on country ID and i need to filter it by Country name.

Can anyone show me how can i do this?? Thanks very much in advance.

6355.filter.bmp (1.26 MB)