| Using CALL_EXTERNAL with C++ Code [message #37856] |
Thu, 29 January 2004 05:49  |
ebertf
Messages: 12
Registered: January 2004
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Junior Member |
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Hello,
I have a problem compiling and linking a DLL in C++ and integrate it
into IDL via CALL External. Everything works fine with C in this way
using a wrapper function:
-------------------------------------------------
C-Code of wrapper function:
#include "stdio.h"
#include "idl_export.h"
#include "myDLL.h"
_declspec(dllexport) IDL_INT IDL_CDECL mydllquest(int argc, void
*argv[])
{
return (dllquest(((IDL_INT) argv[0])));
}
----------------------------------------------------
compiling and linking were done from the DOS Console (VC6 is
installed):
cl -DLL -DWIN32 -D_MT /nologo /I"C:\RSI\IDL60\external\include" /c
mydllglue.c /Fomydllglue.obj
link /out:mydllglue.dll /nologo /nodefaultlib /dll mydllglue.obj
"C:\RSI\IDL60\bin\bin.x86\idl32.lib" dll.lib msvcrt.lib kernel32.lib
-------------------------------------------------------
The call in IDL works like this:
res=call_external(<path of
mydllglue.dll>,'mydllquest',1,/cdecl,value=[0])
---------------------------------------------------------
Compiling with C is working fine, but when the ending of the wrapper
file is *.cpp or if you use the option /Tp (means: compile this as
C++) then IDL is causing an error.
Can anybody give me a hint, what could be wrong or need to changed
when switching to c++?
Florian
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