[PATCH 0/1] MR5743: user32/tests: Add a test to show that SendMessage(LB_SETCOUNT) adds a scrollbar.

[Dmitry Timoshkov (＠dmitry)]

In addition to existing tests this shows that the call
SendMessage(listbox, LB_SETCOUNT, 100, 0);
adds a scrollbar to the listbox however it doesn't add a nonclient area to
an update region because the call
ValidateRect(listbox, NULL);
validates a client area, and after that a window no longer has an update region.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/5743

[PATCH 1/1] user32/tests: Add a test to show that SendMessage(LB_SETCOUNT) adds a scrollbar.

[Dmitry Timoshkov]

From: Dmitry Timoshkov <dmitry(a)baikal.ru>

In addition to existing tests this shows that the call
SendMessage(listbox, LB_SETCOUNT, 100, 0);
adds a scrollbar to the listbox however it doesn't add a nonclient area to
an update region because the call
ValidateRect(listbox, NULL);
validates a client area, and after that a window no longer has an update region.

Signed-off-by: Dmitry Timoshkov <dmitry(a)baikal.ru>
---
 dlls/user32/tests/listbox.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dlls/user32/tests/listbox.c b/dlls/user32/tests/listbox.c
index c78171ff4d8..747e3dae192 100644
--- a/dlls/user32/tests/listbox.c
+++ b/dlls/user32/tests/listbox.c
@@ -1939,11 +1939,17 @@ static void test_set_count( void )
     GetUpdateRect( listbox, &r, TRUE );
     ok( IsRectEmpty( &r ), "got non-empty rect\n");
 
+    ret = GetWindowLongA( listbox, GWL_STYLE );
+    ok((ret & (WS_VSCROLL | WS_HSCROLL)) == 0, "Listbox should not have scroll bars\n");
+
     ret = SendMessageA( listbox, LB_SETCOUNT, 100, 0 );
     ok( ret == 0, "got %ld\n", ret );
     ret = SendMessageA( listbox, LB_GETCOUNT, 0, 0 );
     ok( ret == 100, "got %ld\n", ret );
 
+    ret = GetWindowLongA( listbox, GWL_STYLE );
+    ok((ret & (WS_VSCROLL | WS_HSCROLL)) == WS_VSCROLL, "Listbox should have vertical scroll bar\n");
+
     GetUpdateRect( listbox, &r, TRUE );
     ok( !IsRectEmpty( &r ), "got empty rect\n");
 
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/5743