From: calder AT stat DOT colostate DOT edu (Matt Calder) Subject: Calling gnu32-dlls from 16-bit programs 29 Mar 1997 12:55:25 -0800 Approved: cygnus DOT gnu-win32 AT cygnus DOT com Distribution: cygnus Message-ID: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Authentication-Warning: tlaloc.stat.colostate.edu: calder owned process doing -bs X-Sender: calder AT tlaloc Original-To: gnu-win32 AT cygnus DOT com In-Reply-To: Original-Sender: owner-gnu-win32 AT cygnus DOT com Thanks for the quick response, but I perhaps didn't make the situation clear. So here is a more precise description: I have a 16-bit dll written in MSVC that can call 32-bit dlls via the 'Generic thunking' functions LoadLibraryEx32W, GetProcAddress32W, and CallProcEx32W. This works for 32-bit dlls generated by MSVC and Borland 4.52. It seems to me that there is no special processing required by the 32-bit compiler, a dll is a dll is a dll (Here is where I might be wrong). The compiler support you mention is on the 16-bit end and is taken care of by the above mentioned API's. (I realize that calls back into the 16-bit dll are out of the question, which is perhaps your point). The problem arises that the 32-bit dll does not load with the LoadLibraryEx32W, and I cannot obtain error information. I seem to recall a thread concerning LoadLibrary and gnu32 dlls, was that ever resolved? Matt > Your question about not being able to link 32-16 thunking layer is easily > answered: this will never work because that kind of support needs a lot > of help from the compiler: pointers have to be converted from 32 bit flat > pointers to 16:16 segmented pointers before you can use those in a 16 bit > application. This is not provided by gcc at all, so that will never work. > /*****************************************/ /* Matt Calder, Dept. of Statistics, CSU */ /* http://www.stat.colostate.edu/~calder */ /*****************************************/ - For help on using this list, send a message to "gnu-win32-request AT cygnus DOT com" with one line of text: "help".