The attached patch allows to build XmlRpc++ 0.7 as a
DLL under Win32. The changes are of 2 kinds:
1. in the header files XMLRPC_DLLDECL macro is used
with all files declaration
2. the VC++ 7.1 project file has been modified to
produce a DLL instead of a LIB
allow DLL build of XmlRpc++