ReportPicture.DataField
From Xojo Documentation
Property (As String )
aReportPicture.DataField = newStringValue
or
StringValue = aReportPicture.DataField
Supported for all project types and targets.
or
StringValue = aReportPicture.DataField
Supported for all project types and targets.
The name of the field from the datasource to bind to the control.
Notes
Binary fields in REAL SQL Server are supported. If a ReportPicture has both an Image and a DataField specified, then the DataField will be used. The picture assigned to the Image property acts as a default if there is no image assigned to the DataField or cannot be read successfully.