help says this about the ME keyword.
The Me keyword behaves like an implicitly declared variable. It is automatically available to every procedure in a class module. When a class can have more than one instance, Me provides a way to refer to the specific instance of the class where the code is executing. Using Me is particularly useful for passing information about the currently executing instance of a class to a procedure in another module. For example, suppose you have the following procedure in a module:
Either will work
you can see in the example that a button will change the activecontrol.
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