>So how can I change the background color of a cell that is disabled and not the current focus?
>
>David

DynamicBackColor should do it, as Antonio and Nadya noticed.
For example:

* Grid.Init
this.column3.DynamicBackColor = "IIF(mycondition = somevalue, RGB(255,0,0), RGB(255,255,255))"

For the grid cell which does not have a focus it has to show the appropriate backcolor. It does not matter whether column and/or column textbox is enabled or disabled, or the column is read-only (or any combination of these properties settings).

I would rather check your IIF expression and how you actually write it.
For example this expression will work:

this.column3.DynamicBackColor = "IIF(mycondition = somevalue, RGB(255,0,0), RGB(255,255,255))"

and this will not:

this.column3.DynamicBackColor = "IIF(mycondition = somevalue, RGB(255,0,0), RGB(255,255,255)) "

The reason is in one extra space in the IIF expression between the last bracket and closing quote.