Download LabWindows/CVI Programmer Reference Manual

Chapter 5
Distributing Libraries and Function Panels
After the user installs the library files, the modreg program must be run on the user’s disk
using the command file.
LabWindows/CVI must not be running when you use the modreg program to
modify the Registry. If LabWindows/CVI is running while you use this program, you will
lose your changes.
Caution
Specifying Library Dependencies
When one library you distribute is dependent upon another library you distribute, you
can specify this dependency in the function panel file for the dependent library. When
LabWindows/CVI loads the dependent library, it attempts to load the libraries upon which it
depends. Use the Edit».FP Auto-Load List command in the Function Tree Editor window
of the dependent library to list the .fp files of the libraries upon which it depends. Refer to
Chapter 5, Function Tree Editor, of the LabWindows/CVI Instrument Driver Developers
Guide for details on this command.
LabWindows/CVI can find the required libraries most easily when they are all in the same
directory as the dependent library. When you cannot put them in the same directory, you must
add the directories in which the required libraries reside to the user’s Instrument Directories
list. The user can manually enter this information using the Options»Instrument Directories
command in the Project window. Also, you can add to the Instrument Directories list by
editing the Registry.
The modreg program is in the LabWindows/CVI bin subdirectory for this purpose. A
documentation file called modreg.doc and the source code are in the same directory.
Assume that you install two .fp files in the following locations:
c:\newlib\liba.fp
c:\genlib\libb.fp
If liba depends on libb, you must add the following path to the user’s Instrument
Directories list:
c:\genlib
For LabWindows/CVI to be able to find the dependent file, your modreg command file
must be:
setkey
[HKEY_CURRENT_USER\Software\National Instruments]
appendkey CVI\@latestVersion
add InstrumentDirectories InstrDir "c:\gewlib"
LabWindows/CVI Programmer Reference Manual
5-2
www.ni.com