DLGWINDOWEXTRA is 30 (both on win32 and win64). This has storage for the following entries: DWLP_MSGRESULT (0), DWLP_DLGPROC (8), DWLP_USER (16)
We used to store the dialog info pointer using SetWindowLongPtr (DWLP_ROS_DIALOGINFO == DWLP_USER+sizeof(ULONG_PTR) == 24), which was fine on win32, but failed on win64, since there wasn't enough space left (24 + 8 = 32 > 30).
Rewrite the way the DLGINFO pointer is stored, by adding an additional field to the WND structure and set it using NtUserxSetDialogPointer (which is what it is for).
Also fix too small cbWndExtra for the button class.
DM_REPOSITION is dialog message that can reposition the dialog to the workarea when the dialog is partially/entirely in outside of the workarea. CORE-16490
Patch :
Vijay Kiran Kamuju : Add DlgDirList wildcard checks.
Nikolay Sivov : Fix setting negative dialog item ids.
Alistair Leslie-Hughes : Don't reset focus if current dialog is a child.
Dmitry Timoshkov : If there is no dialog controls to set focus to then
set focus to dialog itself.
Zhiyi Zhang : Send notification for the focused button in
IsDialogMessage().
Huw Davies : Avoid using the comma operator in a while condition.
Patch skipped : a525631920d74e9d797f38305b89e63aed1c5c41 : Scale dialog
base units based on DPI awareness.
Import Wine commit:
b1b8fb77be
"user32: Add support for navigating a group of radio buttons using a keyboard.
The patch approximates the behaviour observed in the message tests
but still doesn't make the message tests pass without failures.
"
by Dmitry Timoshkov.
See bug report https://bugs.winehq.org/show_bug.cgi?id=16845
