Hi Experts:

I want to display the value of a selected
record's field in a combo box.

If the value hasn't been defined for that
record, I want the collapsed combo box to
display a blank for the selected text.

When I bring the enclosing dialog box up,
the combo box shows a blank. And the display
changes as each record with a legal value is
selected. But I'm not seeing a method to
force text, in this case blank, that isn't
one of the entries in the dropdown list.

I can live with creating a combo box list
element with a blank entry, but I'd rather not
have a blank entry as a choice a user might
select.

Thanks
Larry

Larry Lindstrom wrote:

I've tried passing an index of "-1" to the
combo box, and it's now displaying a blank, as
I want.

Is this a safe way to de-select a combobox's
selection, and display a blank, for all Windows
versions? I'm developing on Win2K, but I need
to support Win98 onward.

Thanks
Larry

Larry Lindstrom wrote:
That's fine, as long as your code copes with LB_GETCURSEL returning -1.

--
Tim Robinson (MVP, Windows SDK)
http://mobius.sourceforge.net/

Tim Robinson wrote:

Thanks Tim:

I hadn't thought to check the index, I will now.
Is this the recommended method to reset a combobox?

Minor typo - I think the message is "CB_GETCURSEL".
Because a combobox is a type of listbox, they might
be the same message.

Thanks
Larry

Larry Lindstrom wrote:
[...]
I don't know of any other method...

You're right . I was originally in MFC mode and wrote GetCurSel. I thought
I ought to write the Windows message name instead, and got the wrong one.

Annoyingly, some LB_xxx messages have the same values as some CB_xxx
messages, so this can work by accident.

--
Tim Robinson (MVP, Windows SDK)
http://mobius.sourceforge.net/