This sample program was written in Visual Basic and is available with a
source code project for Visual Studio 2005 or Visual Studio 2008. This program requires .Net version 2.0 or above. The sample program
demonstrates most of the WinHLLAPI functions defined in the WinHLLAPI
specification. This application is an MDI (Multiple Document Interface)
application so you may connect to multiple terminal emulation sessions at the
Installing the Sample Program
Click the download link above to download the zip file
containing the program executable and all the source code. Unzip the
program to your hard drive. The zip file was saved with full path
information and the WHLLAPI3270VB folder will be created in the
The Visual Studio solution file is WHLLAPI3270VB.sln.
The executable file is:
Start the WHLLAPI3270VB program (WHLLAPI3270VB.exe)
Open the WHLLAPI3270VB File menu and select New... to create
Respond to the prompt for the WHLLAPI DLL file. This is the DLL the
application will use to interface with TN3270 Plus. In the default TN3270 Plus
installation, this file is:
c:\Programs Files (x86)\SDI\TN3270 Plus\Whllapi.dll (32-bit)
c:\Programs Files (x86)\SDI\TN3270 Plus\Whllapi64.dll (64-bit)
Open the WHLLAPI3270VB Other Function menu and select Start
Emulator... to start TN3270 Plus. Or, you may start TN3270 Plus
.Connect a TN3270 Plus session. Your TN3270 Plus session must be connected
before you can access the terminal emulation screen with WHLLAPI3270VB. The
TN3270 Plus session must have a WinHLLAPI Session ID defined (Setup, Host,
WinHLLAPI Session ID).
Open the WHLLAPI3270VB PS Function menu and select Connect PS. You
are prompted for the Session ID. Specify the WinHLLAPI Session ID specified
in your TN3270 Plus session.
The WHLLAPI3270VB program now has access to the terminal emulation screen
and you may send information to, and receive information from, the terminal
emulation screen. For example, Open the WHLLAPI3270VB PS
Function menu and select Copy PS to copy the contents of the terminal
emulation screen into the WHLLAPI3270VB window.