Hi Sai,
What is the use of mouse down event in the vi that you had specified?
I cite from Cory's old post containing that VI:
If a white square is clicked, it will turn red.
That's why there is a MouseDown event…
Best regards,
GerdW
using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019