Specifications

3-12 Creating an Extension

3-12

Debug the Extension

To debug the extension, you can set breakpoints on just about

any line in your Visual Basic class. Initially, you should probably

set a breakpoint on the Initialize method. Then, start the

extension (via the Start button or the Start command in the Run

menu).

Next, start HYSYS and create an instance of your extension. This

is done in the same manner as you would create other objects of

the same class. For example, extension Unit Operations can be

created through the UnitOps property view (accessed though

the F12 key).

When you create an instance of your extension, HYSYS creates a

container for it. This container first creates an instance of your

Visual Basic class, and then calls its Initialize method. At this

point, your breakpoint in Visual Basic should be reached. Now

you can inspect variables and step though your code.

You can also use the Debug object in Visual Basic to print

information to the Debug property view while the extension

runs.

Distribute the Extension

Once you are confident that your extension is behaving properly,

you can create an ActiveX DLL file. Create the DLL file by

selecting the appropriate option from Visual Basic’s File menu.

The end result of this step is an extension that you can

distribute without exposing any proprietary information or

methods.

To distribute your extension, you must provide the DLL file, the

EDF file, and any other files required by your extension (i.e., a

separate FORTRAN DLL called from your extension). You must

extension calculations. You can use the registration tool found

on the Extensions tab of the Session Preferences property view

for this, or you can include this step in your own setup program.

For more information on

debugging, please

consult your Visual Basic

manual and help files.