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© National Instruments Corporation 31 LabWindows/CVI Release Notes for Windows
New Error Codes
Table 6 lists new DDE Library error codes.
Multithreading
The DDE Library is now multithread safe when used on Windows 95/NT in a standalone
executable or in a DLL called from a standalone executable. A few restrictions exist, however,
that you must observe. These restrictions stem from limitations of the Windows DDE:
• After you call
RegisterDDEServer
to register your program as a server, you must
make all subsequent function calls that apply to the server in the same thread in which
you called
RegisterDDEServer
.
• After you call
ConnectToDDEServer
to create a client connection, you must make all
subsequent functions calls that apply to the connection in the same thread in which you
called
ConnectToDDEServer
.
Changes to the TCP Library
This section contains information on enhancements to the TCP Library.
Multithreading
The TCP Library is now multithread safe when used on Windows 95/NT in a standalone
executable or in a DLL called from a standalone executable.
New TCP Library Functions
The following seven new functions in the TCP Library are listed in alphabetical order:
•
GetHostTCPSocketHandle
obtains the system socket handle that corresponds to a
TCP Library connection.
•
GetTCPHostAddr
obtains the IP address of the computer on which your program
is running.
–15 –kDDE_GeneralIOErr
–29 –kDDE_Reentrancy
Table 6. New DDE Library Error Codes
New Code Defined Constant
–13 –kDDE_NotThreadOfServer
–14 –kDDE_NotThreadOfClient
Table 5. Obsolete DDE Library Error Codes (Continued)
Obsolete Code Defined Constant