Bob, Thanks a lot.That was very usefull.A concern, I am using mmk compiler as of now for an applicaion developed on c++ i will have to port this X-Windows developed application to DECWindows Motif,will the compiler remain the same for the Unix uses the aCC compiler and the Exceed software.I could'nt figure how the UIL features in here. -Shari

To clarify: MMK is not a compiler, it is a module management utility, the equivalent of "make" on Unix systems. The C++ compiler (command) is usually CXX, and the linker command is CXXLINK. Since You are using already MMK, You certainly detected that on VMS there are 2 steps to make a program: compiling and linking, while in Unix this is done by a single command like CC. Now for UIL: in VMS this is the same as in Unix, it is defined by Motif. Just the command syntax is different: In VMS UIL name.UIL produces name.UID while in Unix it produces a.uid, unless explicitely specified as uil -o name.uid name.uil. So inside Your MMK file, just change the UIL command to omit the "-o" option.