Sets the value of a project setting.
| Parameter | Description | 
|---|---|
| Project | Full name of the target project. When empty, the currently selected project is used. | 
| set | Name of the project setting to set. | 
| index | Optional index of setting. If missing, then 0 is used. | 
| value | New value of setting. | 
See also "XAfActionSetting" to change other than project settings.