Well, on my Windows machine, the call "SmalltalkImage current getSystemAttribute: 10003" returns a string with interesting information about your GFX hardware including the "primary monitor resolution".

Graphics Hardware Details
-------------------------
Display Information: 
Graphics adapter name: Intel(R) HD Graphics 5000
Primary monitor resolution: 2560 x 1440

Device: ???
Adapter String: Intel(R) HD Graphics 5000
Bios String: Intel Video BIOS
Chip Type: Intel(R) HD Graphics Family
DAC Type: Internal
Memory Size: 0x40000000

Driver Versions:
igdumdim64: 

Best,
Marcel
Am 16.01.2018 17:44:08 schrieb Louis LaBrunda <lou at keystone-software.com>:
Hi,

Is there a way to determine the screen size without first going to full screen mode?

Lou
--
Louis LaBrunda
Keystone Software Corp.
SkypeMe callto://PhotonDemon


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