Access to the List Control in an Instance List

Filters can access the list control in the instance list handlers using the method avListManager.avVisualList.

This allows filters and command handlers to directly access the list control displayed by the instance list handler, provided that:

• The instance list handler implements the list as a PRIM_LIST
• The instance list handler makes the list available. (The standard instance list handlers VF_UM040O and VF_UM044O do)

This allows filters to make minor changes to the appearance of the instance list.

For example, if the instance list normally looks like this:

 
You could modify it from the filter so that it looks like this:

 
Using code in the filter's uInitialize routine that looks like this:

See shipped examples DF_T72* (In the VLF-ONE shipped demo, Examples --> Advanced --> Control Instance List 2). Also see Low Level Direct Access To The Visualization List in VLF-ONE Instance Lists.