How do I tick a check box through code?

I have a check box that I need to tick or untick based on a users saved preferences read from a map but cannot seem to figure it out.

I have tried

Where CheckBox1_autosearchnet is the check box name.Have tried other variations too such as


but without success. Unfortunately I am still new to B4A and never used a language that had check boxes before so can someone please tell me what I have done wrong?

Thanks.

Dave