Tick/Untick check box/radio button/toggle button from the keyboard
Use the Tab key or the mouse to select the check box and then press space bar key
To check/uncheck a checkbox (tested in Windows 7):
+ to check
- to clear
There is no way to control this for sure.
There are underlying controls that have default behaviors in Windows forms. Factors such as if these controls are a part of a control group will also have an affect on the outcome.
Also, there is no way to know how a developer handles certain events based on control selection and changes.