Optimize for the case where a DLL with no path is requested and it is
already loaded.

Fix ref counting.

local drivers.

Allocate and supply a DRVCONFIGINFO structure for DRV_CONFIGURE when
application does not supply one.

Broadcast notifications are fleshed out and are now fully functional.

- Rework acmDriverAddA to call acmDriverAddW.
- Implement stub for acmDriverAddW with switch for the 3 known cases
  of driver add.
- Implementation for case ACM_DRIVERADDF_NAME, which loads driver name
  & alias from registry (similar to msacm32 load).

Foundation for notification broadcasts with support for deferred
notification.

load time.

to the buffer after the first batch of data has been written to the
pipe.

doesn't signify an error; it is just unusual.

It looks like Windows doesn't change the primary buffer length when
changing formats so make the tests fail now.
This means the current ALSA implementation is broken when hardware
acceleration is set to full and the primary buffer format is changed.

and move most of the COM functions to the DirectSoundDevice class.

- Separate WM_NCCREATE and WM_SETTEXT.
- WM_SETTEXT and WM_SETFONT are ignored for static controls that don't
  display text.
- WM_SETTEXT must not be used to change the icon/bitmap/metafile.
- Immediately repaint the control on all occasions.

STM_GETIMAGE returns NULL if the given image type doesn't match the
control's style.

- Support SS_REALSIZEIMAGE (this flag means "it's not necessary to
  load icons in the default icon size").
- SS_ICON: Ability to display cursors.

- Support SS_REALSIZECONTROL (this flag means "don't resize the
  control to the size of the bitmap/icon").
- Always call GlobalUnlock16 after GlobalLock16.

- Always paint the background of static controls displaying enhanced
  metafiles.
- Also paint the background if there's no metafile to display.

- Support DT_END_ELLIPSIS, DT_PATH_ELLIPSIS and DT_WORD_ELLIPSIS.
- Paint simple text without prefixes (SS_SIMPLE | SS_NOPREFIX) with
  the ExtTextOut function like the native control does.
- Gray text color: Only for non-simple static controls.

ACM_METRIC_DRIVER_SUPPORT.
Fix copy&paste mislabeling on acmDriverID test failure.