Looks up and retrieves the Revit command id with the given id string. 
   Namespace:   Autodesk.Revit.UI  
  Assembly:   RevitAPIUI  (in RevitAPIUI.dll) Version: 17.0.0.0 (17.0.1090.0) 
  Since:  2013 
Syntax
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Parameters
- name
 -  Type:  System String  
he Revit command name. Refer to the entries in the Revit journal to find the string to use for a particular command. 
Return Value
The Revit command id. Returning "null" if a command with the given name was not found.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |