3 Combo Boxes

I am very new to VBA so any help would be great! I have a data set in another file that has 3 col with thousands of rows. In all 3 columns I have values that are not unique. I need 3 combo-boxes. In the 1st combo box, I need to be able to choose what is in column "A" (bringing back unique values) for the diff. types of business units I have. Next, depending on the bus. unit, I need combo box 2 to allow you to select a specific customer (depending on the business unit you have selected - column B in data set). Finally, in combo box 3, I need the user to be able to select the different cost centers that exist for a given customer (column C in data set). I need unique values for all 3 col.

I think I have combo box 1 with the following code:

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Could someone help me figure out how to do combo box 2 and three? Any help is greatly appreciate.

Thank you!

Hi and welcome to the forum,

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Perhab Untest

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You want get data from wbexternal from sheets("#2table_Revenue")
With columns(1:3)
Example If in a8:a12 = a,a,b,c
In b8:b12 = x,xx,x,xd
In c8:c12 = gx,gc,gx,gd

In combobox1.list = a,b,c
Then what you want result in combobox2 and combobox3

If only get unique

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