Try this:
rowsourcetype=alias
rowsource=MyCursor.MyField

>I have an As Top Level form containing a combobox with a cursor as rowsource
>(rowsourcetype is Field). A button beside the combobox is use to call
>another form (In Top Level and Modal). There is nothing, absolutely
>nothing in that form. Also nothing else than a Do Form in the button
>of the calling form. And when I close the second form, the listindex of
>my combobox (which was on the second item - listindex=2) becomes equal to 1.
>
>How do you explain that strange behavior?