I can't get all of the button names

I have a sheet that have many buttons.

For example:

Sheet1
-> btnReset
-> btnAdd
-> btnDelete
-> btnClear

-> vbtnDisableAll -> When the user click this button it will trigger all of the other "btn..." buttons to Visible = False

After that when the user click again the vbtnDisableAll -> it will back to Visible = True again.

*Can someone help me? And also give me a link to understand getting named characters.