One visible case is the setup LiveCD error dialog, where the message box button can appear with a wrong bold/garbled look instead of the normal default-pushbutton appearance.
## Root cause
`win32ss/user/user32/controls/button.c` stores button state with `GetWindowLongPtrW` / `SetWindowLongPtrW`, but the control extra-byte layout was still defined as if the first slot were only `sizeof(LONG)`
On 64-bit builds, that causes the stored state to overlap the cached font, image, and UI-state fields.
Based on KRosUser's button_fixnotif.patch.
JIRA issue: CORE-6542, CORE-19384
Notify BN_CLICKED to the parent on WM_SETFOCUS message
handling if the button type was either BS_RADIOBUTTON or
BS_AUTORADIOBUTTON, and if the button was unchecked.
Based on KRosUser's button.patch.
- Fix DLGC_... handling by using & operator
in BUTTON_CheckAutoRadioButton
in button.c.
- Fix DLGC_... handling by using & operator
in IsDialogMessageW in dialog.c.
- BM_CLICK's wParam must be zero.
CORE-17210
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
Ahmed Arif