User`s guide

Optimizing Agilent VEE Programs Chapter 12
VEE User’s Guide 453
Using Dynamic Link Libraries
On PCs, you can use the compiled functions from Dynamic Link
Libraries (DLLs) as a part of a VEE program. DLLs may be
compiled functions that you have written yourself (contact
Microsoft for documentation about writing DLLs), or DLLs that
you have purchased or downloaded from the Web.
Integrating a DLL into an Agilent VEE Program
This section describes how to import a DLL into a VEE program.
Write or obtain the DLL as described above, then follow these
steps to use the DLL:
1 Select Device ⇒ Import Library.
The Library Type includes three choices: UserFunction,
Compiled Function, and Remote Function. Change the
Library Type field to Compiled Function (the default is
UserFunction). For a Compiled Function, the Import
Library object includes a field for the Definition File, as
shown in
Figure 257.
Figure 257 Importing a Library of Compiled Functions
NOTE
VEE supports both the "_cdecl" and "_stdcall" calling conventions. Most
customer-written DLLs use the _cdec1 calling convention. Most Win32
API calls use _stdcall. VEE supports both naming conventions, so you can
use most off-the-shelf DLLs as well as your own.