Display model

The display model (part of NVDA Helper), is a legacy mechanism for scraping information during the rendering of GUI applications.

For information on working in this area see the NVDAHelper/readme.md file.

Testing GDI applications

To test:

Use NVDA+numPad 7 to enter screen review mode.
Use the number pad to read lines (7, 8, 9), read words, (4, 5, 6), or characters (1, 2, 3).

Additionally

Use NVDA+shift+f to report formatting.

Note:

For color reporting enable the option (via Document formatting panel) "report color".
To report transparencies in color enable the option (via advanced settings panel) "Report transparent color values".

There are several simple test applications available: https://github.com/nvaccess/testDisplayModel