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About IFS Client Developer Help

The IFS Client Developer help system provides quick lookup information on all of

IFS Client Developer features.

Scalable Application Language

Scalable Application Language (SAL) is a procedural language used for writing Centura actions

(procedures) that you want your application to execute when events take place.

You add SAL statements

to:

• The Application Actions

section of an outline.

• The Actions section of an Internal Function.

• The Menu Actions section of a menu item.

• The Message Actions

section of an object.

See Also

Conventions

Statements

Operators

Data Types

Arrays

Variables

Constants

Expressions

Command Line Arguments

System Functions

Internal Functions

External Functions

Conventions

Conventions and standards exist and should be maintained when defining objects, variables,

and constants, and adding SAL statements to your application outline.

Following are some general rules and guidelines you should remember:

• Centura is case sensitive. Upper and lower case characters are interpreted differently.

• Prefixes of objects, functions, and messages are important for maintaining consistency

within an application, and for making it easy to read.

SAL functions start with the prefix ‘Sal’ or 'Sql'.

Global Declarations

...

Application Actions

On SAM_AppStartup

Call SalModalDialog ( LoginBox, hWndNull )

Return

Return breaks the flow of control and returns a value to the caller.

The syntax is:

Return Expression

Example:

Message Actions

On SAM_KillFocus

Return SalIsNull ( fldName )

If you are using a function that returns a Boolean value but you do not include a Return

statement in your code, the function returns FALSE.

If you are using a function that returns a numeric value but you do not include a Return

statement in your code, the function returns zero (0).

Select Case, Case, Default

Use Select Case when you have a series of conditions that you want to test.

With the Select Case statement, Centura successively compares the value of an expression

against Case constants. Both the expression and the constants must be number data types.

A Break statement signals the end of a Case, and terminates execution of the Select Case

statement. You must have a Break at the end of each Case statement unless you want the

program to continue execution through to the next Case. The Default case is optional, and if it is

present, it is placed at the end of the Select Case statement. It executes when the value of the

expression does not match any of the case constants.

The syntax is:

Select Case (Expression)

Case Constant1

Statement1

Break

Case Constant2

Statement2

Break

Default

Statement3

In the above example, Centura evaluates Expression. If its value matches that of Constant1,

then Statement1 executes. If its value matches that of Constant2, then Statement2 executes. If

no Case constant value matches that of Expression, then Statement3 executes.

You can specify as many Case constants as you want, but there can be only one Default section.

Indentation determines the conditional flow of control. Use Break to terminate a Case.

To allow more than one Case constant to execute the same statement, stack them like this:

Select Case (Expression)

Case Constant1

Case Constant2

Statement1

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