Object required = Passing Listbox to a custom function

This is function that i have put in my userform module. The idea is to populate listbox from a select range, and remove empty items within userform_init module.

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I have all of my code in userform. My object hierarchy is as follows: FindReplace (Userform) => FANumbers (Listbox)

When I try to use the function in userform_init procedure to clear empty items in the listbox, I get Object Required error?

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This doesn't work even when I change data type from msforms.listbox to listbox in the function parameter.

I also tried removing Me but still gives the same error.

Now there is an alternative way that works such as:

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But I am trying to learn how to pass a value to a function for my own knowledge sake. Please guide me how to pass the listbox argument.

Change ListBox to msFoms.ListBox

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However, if the RowSource perperty is used, you will get error at .RemoveItem/