From: ciccio on
The solution is here
http://kb.cadzow.com.au:15384/Cadzow/details.aspx?ID=1898

The D-Link AirPlus Utility does not work with Windows XP Service Pack 3. Upon loading, it displays: �AirGCFG.exe - Entry Point Not Found. The procedure enry point apsGetInterfaceCount could not be located in the dynamic link library wlanapi.dll.�.
A workaround is to use the pre-SP3 version of wlanapi.dll and place it in the appropriate directories. Upon loading, this version of the file will be used instead of the version in the System32 directory.

xcopy %Windir%\$NtServicePackUninstall$\wlanapi.dll "%ProgramFiles%\D-Link\AirPlus G"
xcopy %Windir%\$NtServicePackUninstall$\wlanapi.dll "%ProgramFiles%\ANI\ANIWZCS2"