[reactos] 01/01: [WIN32SS][NTUSER] Fix ScrollWindowEx SW_SCROLLCHILDREN (#2327)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9199c90328e051f2f2930d...

commit 9199c90328e051f2f2930de1f74aff9d38aaa76c
Author:     Katayama Hirofumi MZ [e-mail]
AuthorDate: Tue Feb 11 20:59:14 2020 +0900
Commit:     GitHub [e-mail]
CommitDate: Tue Feb 11 20:59:14 2020 +0900

[WIN32SS][NTUSER] Fix ScrollWindowEx SW_SCROLLCHILDREN (#2327)

Based on the patch of I_Kill_Bugs of JIRA user. CORE-16687, CORE-12114
---
 win32ss/user/ntuser/scrollex.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/win32ss/user/ntuser/scrollex.c b/win32ss/user/ntuser/scrollex.c
index c344cec9475..82f248ec367 100644
--- a/win32ss/user/ntuser/scrollex.c
+++ b/win32ss/user/ntuser/scrollex.c
@@ -385,6 +385,10 @@ IntScrollWindowEx(
          rcChild = Child->rcWindow;
          RECTL_vOffsetRect(&rcChild, -ClientOrigin.x, -ClientOrigin.y);

+         /* Adjust window positions */
+         RECTL_vOffsetRect(&Child->rcWindow, dx, dy);
+         RECTL_vOffsetRect(&Child->rcClient, dx, dy);
+
          if (!prcScroll || RECTL_bIntersectRect(&rcDummy, &rcChild, &rcScroll))
          {
             UserRefObjectCo(Child, &WndRef);