Populate texbox from multiple comboboxes

Hi,

I want to populate a textbox to read what was inputted into three other textboxes.

So far I have a change event that puts the value into a textbox as follows

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I'd like to add some code so that TextFullName also displays the values from two additional comboboxes named ComboSpecies and ComboAuthor.

So if I entered "Pinus" into ComboGenus, "strobus" into ComboSpecies, and "Linnaeus" into ComboAuthor, then TextFullName would display "Pinus strobus Linnaeus" with the first two words italicized.

Also, I was wondering if ComboGenus was entered as "Pinus" and nothing else, then TextFullName would display "Pinus sp."

Any help would be greatly appreciated.

Marc