SvySearch for parent-records without child-records

[rph]

Hi

I want a search to find all customers that don't have any orders.

Is there a possibility to use the svySearch-Modul for such a search? And if yes, how?

In our Smart-Client-Solution this works, if we enter "^=" in a field of the child-form (and we need to set "application.putClientProperty(APP_UI_PROPERTY.RELATED_NULL_SEARCH_ADD_PK_CONDITION, false)").

Thanks for any suggestions.
Roland