- Correctly handle the return values for WM_SIZING and WM_SIZE messages.
- Use NULL for hWndInsertAfter parameter of DeferWindowPos() when
we don't care about the Z-order.
- Specify SWP_NOMOVE for controls that don't move during resizing.
- Fix the IDOK and IDCANCEL buttons when resizing the environment
variables list dialog.
- Fix the dialog "moving" effect that happened whenever an attempt
was made to resize the dialog from either of the
top/left borders, or the top-right/top-left/bottom-left corners,
to a size smaller than the minimal one.
- Use DWLP_USER instead of GWLP_USERDATA when storing user-specific
data into the dialog, since the latter can be used internally by
the Win32 dialog manager implementation.
0d19ab0b82