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.
PR #2135 (e329e83) caused radiobutton regression. This PR will fix it.
- Clear DT_BOTTOM | DT_VCENTER flags upon calculating the button text height.
CORE-16552
CORE-8526
Import Wine commit:
96d0af52eb
"user32: Move the auto radio button group logic from BM_SETCHECK to WM_LBUTTONUP handler.
This patch also changes the logic to get the control style with WM_GETDLGCODE
instead of GetWindowLong to make the message test pass.
"
by Dmitry Timoshkov.
See bug report https://bugs.winehq.org/show_bug.cgi?id=42010
- (ReactOS-only) Fix also the corresponding logic in COMCTL32.
