Product : ISaGRAF V3
Date : 17-June-1997
File : Thunk.Calling 32 bit DLLs from ISaGRAF workbench.htm
Subject : Calling 32 bit DLLs from ISaGRAF workbench
Keywords: Thunk - 16bit / 32bit - DLL
ISaGRAF version V3.x is a Windows 16 bit application. ISaGRAF WDK
(workbench development tool kit provided with IDK) provides opening by
re-writing some of ISaGRAF DLLs.
Such DLLs must be 16 bit coded, developped with MSVC 1.52.
If you want to implement 32 bit DLLs, you also need to implement a
thunking DLL to provide 16 to 32 bit interface.
This can be done using standard thunking method.
Below is an example of integration for ISDK_COM.DLL:
MSVC 4.0 includes complete documentation about thunking:
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