-
July 20th, 1998, 08:14 AM
#1
VC DLLs work only in VC
Hi,
I have written a DLL with 1 exported function using Visual C++ 5.0
When I link it in a program written in VC there is no problem.
When I gave that DLL to a guy who is using Watcom C++ 11.0 he can't link to the function.
Any suggestions?
regards
m1z0
-
July 21st, 1998, 04:23 AM
#2
Re: VC DLLs work only in VC
Have you exported the function with extern "C". Function name decoration (or name mangling) is compiler dependant due to lack of a standard. This will cause a problem when trying to dynamically link to the function by name from another development tool. This could be avoided by using ordinal values instead. Search for extern C in the online help for more information.
-
July 21st, 1998, 07:26 AM
#3
Re: VC DLLs work only in VC
Also, VC generates some useful headers which help:
// If this DLL is dynamically linked against the MFC
// DLLs, any functions exported from this DLL which
// call into MFC must have the AFX_MANAGE_STATE macro
// added at the very beginning of the function.
//
// For example:
//
// extern "C" BOOL PASCAL EXPORT ExportedFunction()
// {
// AFX_MANAGE_STATE(AfxGetStaticModuleState());
// // normal function body here
// }
//
// It is very important that this macro appear in each
// function, prior to any calls into MFC. This means that
// it must appear as the first statement within the
// function, even before any object variable declarations
// as their constructors may generate calls into the MFC
// DLL.
//
// Please see MFC Technical Notes 33 and 58 for additional
// details.
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
|
Click Here to Expand Forum to Full Width
|