Multi-select records in form grid

Hello all,

I have a customer who wants to be able to select either single or multiple records from the TvrExpTable form and then have only the receipts related to these displayed in the DocuView form. 

I have selected the item menu and button to allow multi select. This does not work. I have looked into coding the multi-select using the clicked() override method and the use of the multi select helper class. However, I just can't seem to get it to work. It is also complicated by the fact that the init method and query methods are rather complex in the DocuView form. 

Has anyone had any experience with adding this type of functionality to this form or would know how it could be done?

Any assistance would be appreciated.

Thanks,

Steve