Use macro to reset a checkbox in Base

I have a search form with several numeric and text fields, which also includes a checkbox. There is a button “Clear settings” which uses a macro to clear all entered values - but I cannot find the relevant property of the checkbox in order to reset it (apparently not ‘Value’ or ‘Status’ or ‘Checked’), or how to address it.

Help, please!

You need to have a grip on the model of the checkbox, of course.
How to get that depends. Then the property is
myCheckBoxModel.State
The type is Integer. 0 <==> NotSelected, 1 <==> Selected.
in case of Tri-State 2 should mean Donno (in a spreadsheet shown as #N/A in the linked cell).

Thank you! ‘Status’ was so close!