Owner drawn combo question

[Steve Marshall]

Hi All,

I'm working on an owner-drawn combo box which will display multiple
columns in the list, either from a table in an associated DataSourse or
from delimited strings in the Items collection. It's all going quite
well, and was actually easier to achieve than I had expected.

But I am seeing one peculiar anomaly when I make a selection from the
list. Eveything works perfectly if the list is populated from a
DataSource. But if the list is populated from the typed-in Items
collection, AND the DropDownStyle is set to Simple or DropDown, the
edit field appears to get re-drawn WITHOUT the DrawItem method being
called! Or if it IS called, the DrawItemState does NOT have the flag
set indicating this is the edit field being drawn. The only pattern I
can see here is that the 2 DropDownStyles that do this are the ones
where the edit field is editable by the user. But I can't see why that
should matter.

The above is what I THINK is happening - it's actually quite difficult
to debug this, because the switching of focus between the test form and
the code window generates all sorts of events which confuse the issue
greatly. In my DrawItem code I test for the flag telling me the edit
field is being drawn, and if I put a breakpoint in the code, it is
never hit in the conditions described.

Anyone know what is going on here? Is there some other event I need to
override? Another flag in the DrawItemState? Is this a bug in .NET?

Thanks and regards