>What is the RowSource and how are you disabling the individual items.....?
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>>>>I have some disabled items in a list box, but I can still select them. I know they are disabled because I set the disabledItemBackColor property. I thought that VPF would handle this automatically. Do I need to code for this, or is something else wrong?
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>>>Is it visually selecting them only or does Listbox.Selected(i) get set TRUE?
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>>Visually, it looks disabled, but I can move the highlight to it and actually select it....so both.

RowSource is an array. I'm disabling the individual items by making the first character a "\" in the form load, so it is before the listbox even exists.