How to write code that waits for the A process to disappear

[kyjdp]

I want to run two programs: A.exe and B.exe

1. First run A.exe,

2. When the process of A program disappears, and then run B.exe

How to write code that waits for the A process to disappear? Any suggestions and comments are welcome, thanks in advance

Macro Macro2

Code:

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run "$desktop$\A.exe"

?????? how to write?

run "$desktop$\B.exe"