A Master Detail Form Window is used to display one record from a master LU and a table with a number of records from a detail LU. This is normally used when there is an aggregate relation in the model.
Master Detail windows can be more or less complex. Normally there is only one detail LU, but there can be more. These different detail LU:s can be placed as child tables on the same form window, or on different tabs using a Master Detail Tab Form Window.
The Master Detail Form
Window template combines a
Single Record Form Window, derived from the cFormWindow class,
with a child table. There are
other combinations that can be seen as a Master Detail form window, this template
just makes it effortless to add the most common variant. If you need a more
specialized variant of a Master Detail relationship, start out with a normal
Single Record Form Window and build from there.