Lookup objects
You can use lookup objects for many of the same purposes as combo boxes. Lookup objects are particularly useful when used with a Select Element action. You can also use a lookup as an alternative to creating actions in cells.
This table shows the advantages of using a lookup object instead of a combo box, and some disadvantages:
The advantage of lookup objects over actions in cells is that the size of a lookup is not influenced by the adjacent rows, columns, and hyperblocks. This is particularly useful in complex report layouts.
| Advantages of lookup | Disadvantages of lookup |
|---|---|
| Supports selection of multiple elements | Not a list object. The object does not contain the list that it references. |
| Faster than a combo box in cases where, for example, the displayed list has a large number of elements in a flat structure | Does not react to Selection Changed event. |
| Works inside hyperblocks |
In some cases you might find it useful to convert existing combo boxes to lookups.