anyone ever come across a citrix published app where in seamless mode it has a black border round it when you minimise it and bring it to front it just happens on this single app. When you maximise the app it is fine this is on a single monitor / native 1080p resolution / 100% dpi scaling / high dpi on CWA set to use native res and also tried let the OS scale the resolution with no joy. Also tried a different use video codec for compression policy in studio to test and was same. Added the process for the app to uviexcludes for api hooking and no joy either. breaking out of seamlessless mode shift + f2 doesnt show much and i cant tell if i am getting the black border or not. Tried with and without graphics accelleration enabled for CWA. Via Published desktop using ICA and RDP it's fine so issue specific to seamless

Wasn't there a Registry value I recall somewhere that made this happen? Was ages ago but it seems to ring a bell....will dig through my notes

Cheers will check them out 👍

Yes funny enough we support the same app and have had to work this. Did you figure it out? Use Microsoft Spy+ to find the offending WindowsForm that is causing the black space. Ping me if you need more info.