It does work, if it is a c program. However if I change it to C++ program, it does not link in my environment. I have attach the C++ version. Could you try it and let me know. If it works in your machine, it must have something to do with my environment. Thanks for your help again. Ku ************************** C++ program test.cpp *********************** #include <winbase.h> class A { public: A(int a, double b); private: int _a; double _b; }; A::A(int a, double b) { _a = a; _b = b; }; int main() { A *mya=new A(2,5.6); DisconnectNamedPipe(NULL); //ConnectNamedPipe(NULL, NULL); return 0; } ************* Execution in my environment ************** [root@wasabi2 winetest]# winemaker --lower-none --cuiexe -DSTRICT -I/usr/local/ include/wine .; Winemaker 0.5.8 Copyright 2000 Francois Gouget &lt;fgouget(a)codeweavers.com&gt; for CodeWeavers Scanning the source directories... Fixing the source files... test.cpp Generating project files... . [root@wasabi2 winetest]# ./configure -with-wine=/usr/src/redhat/SOURCES/wine loading cache ./config.cache checking whether make sets ${MAKE}... (cached) yes checking for gcc... (cached) gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc ) is a cross-compiler... no checking whether we are using GNU C... (cached) yes checking whether gcc accepts -g... (cached) yes checking for c++... (cached) c++ checking whether the C++ compiler (c++ ) works... yes checking whether the C++ compiler (c++ ) is a cross-compiler... no checking whether we are using GNU C++... (cached) yes checking whether c++ accepts -g... (cached) yes checking how to run the C preprocessor... (cached) gcc -E checking whether ln -s works... (cached) yes checking for sqrt in -lm... (cached) yes checking for iswalnum in -lw... (cached) no checking for gethostbyname... (cached) yes checking for connect... (cached) yes checking for gcc strength-reduce bug... (cached) no checking whether external symbols need an underscore prefix... (cached) no checking whether we can build a Linux dll... (cached) yes checking whether we need to define __i386__... (cached) no checking for g++ -fpermissive option... yes checking for g++ -fno-for-scope option... yes checking for windef.h... (cached) /usr/src/redhat/SOURCES/wine/include checking for windef.h header... (cached) /usr/src/redhat/SOURCES/wine/include checking for libwine.so... (cached) /usr/src/redhat/SOURCES/wine checking for -lwine... (cached) /usr/src/redhat/SOURCES/wine checking for libntdll.so... (cached) /usr/src/redhat/SOURCES/wine/dlls checking for -lntdll... (cached) /usr/src/redhat/SOURCES/wine/dlls checking for wine... (cached) /usr/src/redhat/SOURCES/wine/wine checking for winebuild... (cached) /usr/src/redhat/SOURCES/wine/tools/winebuild/ winebuild checking for wrc... (cached) /usr/src/redhat/SOURCES/wine/tools/wrc/wrc creating ./config.status creating Make.rules creating Makefile Configure finished. Do 'make' to build the project. [root@wasabi2 winetest]# make c++ -c -g -O2 -fpermissive -fno-for-scope -D_REENTRANT -DWINELIB -DSTRICT -I. - I/usr/local/include/wine -I/usr/src/redhat/SOURCES/wine/include -o test.o test.c pp test.cpp: In function `int main ()': test.cpp:17: `DisconnectNamedPipe' undeclared (first use this function) test.cpp:17: (Each undeclared identifier is reported only once for each function it appears in.) make: *** [test.o] Error 1 [root@wasabi2 winetest]# At 01:03 PM 3/28/2002 -0800, you wrote:

On Thu, 28 Mar 2002, Ku Cheng wrote: This is a regular C vs. C++ issue, not specific to Winelib. When you put it in your source file you were probably missing the "C" in extern "C" ... In winebase.h all function declarations are enclosed with: #ifdef __cplusplus extern "C" { #endif ... #ifdef __cplusplus } #endif So because "C" was missing, the compiler assumed it was a C++ function and mangled the name. Then at link time there was no function by that (mangled) name. -- Francois Gouget fgouget(a)free.fr http://fgouget.free.fr/ War doesn't determine who's right. War determines who's left.