Add user interface parts to a window
Once you create an application and a visual part, you can open a Composition Editor on the part and add a user interface. Upon opening, a Composition Editor shows a window in the main work area, the free-form surface. 
To add a user interface to your application: 
1.	Find a user-interface part that you want in the parts palette. 
2.	Click once on the part to select it. 
3.	Position your mouse pointer over the window in the free-form surface. 
You'll see a crosshair, 

, or a not-available sign, 

, when your mouse is over the free-form surface. 
A 

 means that you can drop the part where your mouse is. 
A 

 means that you cannot drop the part. 
Generally, user-interface parts can go onto the window. Parts that don't make up the user interface cannot go onto the window; you must drop them on the free-form surface beside the window. 
4.	Click once on the window to drop the part. 
Last modified date: 08/01/2019