VinsWorldcom@C:\Users\VinsWorldcom\tmp> cp c:\Windows\SysWOW64\wpcap.dll .

VinsWorldcom@C:\Users\VinsWorldcom\tmp> \Min\MinGW-64\bin\gendef.exe wpcap.dll
 * [wpcap.dll] Found PE image

VinsWorldcom@C:\Users\VinsWorldcom\tmp> which dlltool
C:\strawberry\c\bin\dlltool.exe

VinsWorldcom@C:\Users\VinsWorldcom\tmp> dlltool --as-flags=--64 -m i386:x86-64 -k --output-lib libwpcap.a --input-def wpcap.def

VinsWorldcom@C:\Users\VinsWorldcom\tmp> ls -al libwpcap.a

 Directory of C:\Users\VinsWorldcom\tmp

03/29/2011  02:27 PM            65,656 libwpcap.a
               1 File(s)         65,656 bytes

VinsWorldcom@C:\Users\VinsWorldcom\tmp> ls -al WpdPack\Lib\libwpcap.a

 Directory of C:\Users\VinsWorldcom\tmp\WpdPack\Lib

06/25/2010  10:02 AM            54,276 libwpcap.a
               1 File(s)         54,276 bytes

VinsWorldcom@C:\Users\VinsWorldcom\tmp> ls -al WpdPack\Lib\x64\libwpcap.a
File Not Found

 Directory of C:\Users\VinsWorldcom\tmp\WpdPack\Lib\x64


VinsWorldcom@C:\Users\VinsWorldcom\tmp> cp libwpcap.a WpdPack\Lib\x64