as is done in the Windows headers.
Add #define COBJMACROS where needed in Wine.
Fixes the compilation of the oleaut32/tests/olefont.c and
urlmon/tests/url.c conformance tests with the Windows headers.

needed as it is defined by the Wine headers.
Use __WINE_USE_MSVCRT to detect whether we are being compiled with the
Wine MSVCRT headers or the Windows ones. In the latter case:
 - don't try to include the Wine-specific msvcrt headers
 - skip all the headers.c tests since there's no MSVCRT_* symbols to
   check

Add #define NOBITMAP where needed in the Wine sources.
Fixes the compilation of msacm/tests/msacm.c with the Windows
headers.

GetCPInfoExA() is missing on some Windows platforms, load it
dynamically.

- ConvertINetMultiByteToUnicode/ConvertINetUnicodeToMultiByte should
  return required target length if the target buffer is NULL
- add the tests for all the above
- fix IMultiLanguage2 vtable (it was missing ConvertStringFromUnicodeEx)

headers.

the current brush.  It also now works if the mask bitmap is already
selected into a dc.

pixels, so remove this restriction.

Windows headers.

primary buffer format changed.

lock. Prevents potential deadly embrace.

we should ignore lfWidth.

child's stack.

LB_SELECTSTRING handler so that the caret moves to the index and item
is highlighted.

given two distinct pointers.

style is doesn't.

bitmap for old-style Wizard 97.

size of the provider name on return.