We had ListDialog functions for years and a few people over the years asked for a filter feature. We got that implemented for next version of MBS FileMaker Plugin:

To support that we have 4 new functions to enable filter and set the filter text:

Set Variable [ $r ; Value: MBS("ListDialog.SetShowsFilter"; 1) ]
Set Variable [ $r ; Value: MBS("ListDialog.SetFilter"; "") ]

When dialog closes, you can query filter value, store it in a field and later restore it when you open the dialog again.

Filter allows to enter multiple values separated by space and filters all columns.

Please do not hesitate to contact us with your questions.