How are they different?
In Excel 2016:
?Application.Hwnd
67444
https://docs.microsoft.com/en-us/off...plication.hwnd
?Application.HinstancePtr
140700483846144
https://docs.microsoft.com/en-us/off...n.hinstanceptr
?Application.Hinstance
"Automation error
Catastrophic failure"
https://docs.microsoft.com/en-us/off...tion.hinstance