Black Box GEH-6510 - Manual (Page 29)

DDE Server User’s Guide Chapter Three - Getting Started •••• 25
“trust” this share before any client applications will be able to request data from the
shared application.
An important thing to remember is that each user of the host PC must trust the share
for the DDE Server if View Nodes are to be able to access data from the server. If
you log off the host PC and a new user logs in, they will need to trust the DDE Server
share before any View Nodes can access data. A user may or may not be able to
create and trust shares, depending on their user level at the host PC; if they log in as a
“guest”, they won’t have sufficient access privileges to create and trust shares.
If this sounds intimidating, don’t worry. To make setting up NetDDE quick and easy,
PMCS has an automatic configuration utility. If you prefer a more hands-on
approach, see the directions for manually configuring NetDDE’s shares and trusts
following the Automatic Setup instructions.
Automatic NetDDE Setup: VNDDE.EXE
The NetDDE Share Utility (VNDDE.EXE) automates the process of setting up
shares on Windows 2000 SP2. It is recommended over the manual process for speed
and ease of use.
Overview
The NetDDE share utility was created to simplify creation of DDE shares on
Windows 2000 SP2.
This utility automatically checks to see if a share exists for the DDE Server. If the
share already exists, it is automatically trusted. If no share exists, the utility creates a
DDE share for each version of the GE PMCS DDE Server (it doesn’t matter which
version is installed on the host PC) and then trusts the share. The share has default
properties that allow it to operate without additional setup. You can modify the
share’s properties once it is created, but you shouldn’t need to, in most cases.
As mentioned previously, once a share is created it must be trusted by each user of
the host PC. The consequence of this is that if a new user account is created and the
user logs on with the new account, the shares will not be trusted and requests from
remote clients will be rejected by the NetDDE share manager. The NetDDE share
utility addresses this problem by automatically trusting the share for the current user.
The PMCS installer program places a shortcut to the VNDDE.EXE utility in the
Windows 2000 SP2 "All Users" Start Menu>Programs>Startup, so that the utility
will run automatically each time a user logs in.
The utility
The utility’s file name is VNDDE.EXE, and it should be located in directory
c:\ge_pmcs\tools\. It is an NT/2000 command prompt application and executes in a
DOS command window. There aren’t any command-line parameters. When this
utility is executed, if the shares do not exist, they are created and the message Added
share GE32MODB|* or Added share GE32MTCP|* or Added share
GE32EIND|* is displayed. For the script to create a share, the current user must have
Administrator level privileges. If the shares exist but are not trusted to the current
user, they are changed to trusted and the message Trusted share GE32MODB|* or
Trusted share GE32MTCP|* or Trusted share GE32EIND|* is displayed. Any
user is allowed to trust a share, regardless of privilege level.
If the shares already exist and are trusted, the utility does nothing. No message is
displayed.