1. Publish Spy++ from OS where the app with black border installed on.
2. On endpoint, use storefront website or workspace app to launch app and Spy++ step 1 published.
3. Click Find Window icon on Spy++.
4. Drag the aiming icon to the black border of the application.
5. Take down the Class information. In this case, we write down KPromeMainWindowShadowBorder.
6. Create registry key on VDA:
Under: HKLMSystemCurrentControlSetControlCitrixwfshellTWI
Create Key:
HKLMSystemCurrentControlSetControlCitrixwfshellTWI<App Class Name>
Value#1:
Name: ClassName
Type: REG_SZ
Data: <App Class Name>
Value#2:
Name: Type
Type: REG_DWORD
Data: 0x1000 (HEX)
In this case, fill KPromeMainWindowShadowBorder in <App Class Name>.
7. Restart VDA.
8. Launch app again and will find it work without any black border.