GWIN
From uGFX Wiki
The GWIN module takes usage of all the other modules and combines them into a complete GUI toolkit. Most commonly, the user will interact with the provided widgets through a GWIN#touchscreen. However, the GINPUT module does also allow to use other input methods.
There are three basic types of GWIN elements:
GHandle
The GHandle data type is the main GWIN data type. All three GWIN types use this data type. The GHandle is the object reference and it is used to pass the different windows, widgets and containers around the different GWIN functions.