37 lines
2.1 KiB
Plaintext
37 lines
2.1 KiB
Plaintext
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Open Watcom W32API Headers and Libraries - README
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-------------------------------------------------
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This release of Open Watcom includes a new version of the Win32 headers and
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libraries. These headers and libraries were written specifically for Open
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Watcom and have no basis in the MinGW headers that were shipped with Open
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Watcom 1.7a and earlier. The goal is to provide headers with more thorough
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coverage of the Win32 API, consistency with OW style guidelines, and fewer bugs.
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Every effort has been made to preserve compatibility with the MinGW headers.
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The headers support compiling to target any version of Windows up through
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Windows Vista. However, to preserve compatibility with existing code, the
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default target is Windows 95 or Windows NT 4.0 with Internet Explorer 4.0.
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If you wish to use features specific to a more recent version of Windows, you
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must define the macros WINVER, _WIN32_WINNT, _WIN32_IE, and NTDDI_VERSION
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appropriately, either in your source code or using compiler switches.
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Please note that there was a slight discrepancy between the old MinGW headers
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and the official Microsoft headers. The MinGW version of windows.h included
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winsock2.h, while the Microsoft version includes winsock.h, as does the new
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Open Watcom version. This may cause compiler errors when compiling code that
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includes windows.h followed by winsock2.h when the WIN32_LEAN_AND_MEAN macro
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is not defined. These errors will also occur when compiling such code with
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the Microsoft headers. They can be eliminated by defining WIN32_LEAN_AND_MEAN
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to suppress inclusion of winsock.h by windows.h
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There are several instances in which the headers that shipped with previous
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version of Open Watcom contained undocumented functions that are no longer
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available in current versions of Windows. These functions have been removed
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from the headers. Any code that used these functions should be rewritten to
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avoid using them or to access them through GetProcAddress() or those platforms
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where they are available.
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Documentation for the Win32 API is available over the Internet from Microsoft
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at http://msdn.microsoft.com/en-us/library/default.aspx.
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