National Instruments Window - Manual (Page 38)

LabWindows/CVI Release Notes for Windows 38 © National Instruments Corporation
General Information
Using LabWindows/CVI Utility Library in the Borland Compiler
When you use the LabWindows/CVI libraries with the Borland compiler, the utility.h
header file in the Borland include subdirectory might be referenced incorrectly instead of
the LabWindows/CVI utility.h header file. You can control the search order for the header
files through one of the following methods:
• Place the LabWindows/CVI include directory before the Borland include directory in the
Borland Project Options directory search paths.
• In your source code, refer to the explicit path to the header file, for example, #include
"c:\cvi\include\utility.h" .
• Rename the Borland utility.h file.
Using NetDDE on Windows
Refer to the LabWindows/CVI readme.cvi file for information on using NetDDE on
Windows 3.1, Windows 95, and Windows NT.
Special Instructions to LabWindows/CVI 5.0 Beta Testers
A debuggable DLL built with LabWindows/CVI 5.0 Beta 1 is not compatible with the final
release of LabWindows/CVI 5.0. You must rebuild the DLL before you try to debug the DLL
inside the LabWindows/CVI development environment.
No Support for Multiple Monitor Systems
LabWindows/CVI 5.0 does not support systems with multiple monitors, including
Windows 98, Windows NT 5.0, and third-party solutions for Windows 95/NT 4.0.
Dynamically Loading DLL Created in Third-Party Compiler
Might Lose Handles
If a DLL created in a third-party compiler/linker is dynamically loaded and unloaded from a
process and if that DLL uses the hardware static libraries located in the LabWindows/CVI
\extlib subdirectory, the process loses Windows handles. The external compiler support
libraries that exhibit this behavior are dataacq.lib , easyio.lib , gpib.lib , nivxi.lib ,
and visa.lib . The loss of Windows handles occurs when the hardware static libraries of the
calling DLL do not release the internal handles used to load the hardware libraries. A
workaround is to use the import libraries that come with the DAQ, GPIB, VXI, and VISA
software instead of using the static libraries from the LabWindows
\extlib directory. A
drawback to this solution is that some additional functions unique to the LabWindows/CVI
versions of these libraries are not available.