Thank you very much!
It works for my application!
Run(@ComSpec & ' /c start "" "shell:Appsfolder\Microsoft.Messaging_8wekyb3d8bbwe!x27e26f40ye031y48a6yb130yd1f20388991ax"', '', @SW_HIDE)
- Hit Win-R to open a "Run" input, and type "shell:Appsfolder"
- When in that, hit F-10 to get a menu bar, and from that menu bar select "View / Choose Details"
- Select the radio box for "AppUserModelID". That ID is what you are going to want to execute.
- Select "Details" from the little "View" gadget" on the right hand side.
"shell:Appsfolder\"+AppUserModelID found in the right column