Create a new RibbonPanel on the 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 target tab, on which the new panel will be created. 
- panelName
 -  Type:  System String  
The name of the panel to be created. 
Remarks
 This method will create a custom panel appending to the specified tab. This method is not supported in Macros. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | panelName is a null reference ( Nothing in Visual Basic) . | 
| Autodesk.Revit.Exceptions ArgumentException | panelName is Empty or the tab is not valid. | 
| Autodesk.Revit.Exceptions InvalidOperationException | If more than 100 panels were created or the tab cannot be found. |