Get all the custom Panels on a designated standard Revit tab. 
   Namespace:   Autodesk.Revit.UI  
  Assembly:   RevitAPIUI  (in RevitAPIUI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
| C# | 
|---|
   |  
| Visual Basic | 
|---|
   |  
| Visual C++ | 
|---|
   |  
Parameters
- tab
 -  Type:  Autodesk.Revit.UI Tab  
The tab on which the panels are located. 
Remarks
 Built-in panels will not be included. This method is not supported in Macros.