Need to cross check these changes with WINE ComCtl32 before you PANIC
HACK!!!!
Not in order:
Piotr Caban : Remove unneeded RECT parameter from CBPaintText helper.
Don't invalidate ComboBox on CB_SETCURSEL message.
Don't invalidate ComboBox on LBN_SELCHANGE and
LBN_SELCANCEL.
Add more CB_SETCURSEL tests on ComboBox.
Redraw combo text field even if it's empty.
Let ComboBox edit control handle the redraw even if
CBF_NOREDRAW is set.
Don't do the painting if combobox is not visible in
CBPaintText.
Dmitry Timoshkov : Don't force a combobox repaint on WM_SIZE.
This breaks z-order based painting and causes side effects
for
applications that during the WM_PAINT processing reference
internal
data associated with a not fully initialized window.
Ref :
https://source.winehq.org/git/wine.git/commit/2d9e3236ea8ae752184b8a285f9d616ec94afb8f
Fabian Maurer : Set listbox popup height correctly and add tests.
Properly set dropdown height.
Now that user32 and comctl32 combo are separated,
this won't lead to a regression anymore
Ref :
https://source.winehq.org/git/wine.git/commit/3d0be0bad8eca72e67199ebfb451150d58494ba3
Info by Sebastian Lackner Ref:
https://source.winehq.org/git/wine.git/commit/f0fc0349976924379cc3ae2ff95fb342d7541294
Nikolay Sivov : Remove some misleading TODOs and confusing comments.
When we unselect text after the WM_CBLOSTTEXTFOCUS message,
make sure we also forget we have been focused at all;
otherwise the edit may become focused again, but with an
empty text selection.
CORE-10266
James Tabor