Requirements

Many topics that introduce the syntax of an API element contain information about the build and run-time requirements for using the element. The format is as follows:

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winuser.h.
  Import Library: Use user32.lib.
  Unicode: Implemented as Unicode and ANSI versions on Windows NT/2000.

The first line indicates the versions of Windows NT on which an element is supported. This information may include required service packs, option packs, or components such as Internet Explorer. If an element is not supported, the line reads "Windows NT/2000: Unsupported."

The second line indicates whether an element is supported on Windows 95 or Windows 98. This information may include required OEM service releases, redistributables, or components such as Internet Explorer. If an element is not supported, the line reads "Windows 95/98: Unsupported."

The third line indicates the versions of Windows CE on which an element is supported. If an element is not supported, the line reads "Windows CE: Unsupported."

The fourth line indicates the file that defines an element. This value can be an .h file, .idl file, or .odl file. If the header file is supplied by the user, the line reads "Header: User-defined."

The fifth line indicates the file used to resolve calls to a function or member. This value can be a .lib file, .dll file, or .tlb file. If the import library is supplied by the user, the line reads "Import Library: User-defined." For element types that do not require an import library, this line is omitted.

The sixth line indicates whether an element exists as both a Unicode (W) version and an ANSI (A) version. If Unicode support is not available, this line is omitted.