To compile an application that uses this function, define the _WIN32_WINNT macro as 0x0400 or later. For more information, see Using the SDK Headers.Visual C++ 6.0: To specify compiler options, go to the Projects menu and click Settings, then select the C/C++ tab.Windows 2000 _WIN32_WINNT>=0x0500
define _WIN32_WINNT as 0x0400无须sdk因为是kernel32.lib的且有win98时就有了
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