Using drawing object in code when it activates the macro

I am creating a sorting application in which I have up and down arrows above columns that are used to sort the the rows using advanced sorting options. However, I would like to create a single sub that sorts the column that the arrow is in, and reuse this sub for every arrow. I tried to use Selection.TopLeftCell.Select, and assign the macro to each arrow. I thought that when I clicked the arrow to activate the macro, it would count as "selecting" the arrow, but this did now work. Is there any way to code it so that it knows which arrow was clicked?

Thanks a lot! I got it to work. Looks like I needed to dimension a Shape variable and then set it equal to ActiveSheet.Shapes(Application.Caller). From there, I could use the TopLeftCell function on the new Shape variable.