GetMessage

Description

Returns the error message from objects of type Throwable.

Syntax

throwableobject.GetMessage ( )

Argument	Description
throwableobject	Object of type Throwable from which you want to retrieve an error message

Returns

String. The error text for system error objects, such as RuntimeError, is preset.

Usage

You can set the error message for an object of type Throwable using the SetMessage function.

Examples

Example 1

This example catches a system error message and displays that error in a message box. Catching the system error prevents the application from terminating when the arccosine argument, entered by the application user, is not in the required range:

Double ld_num

ld_num = Double (sle_1.text)

TRY

sle_2.text = string (acos (ld_num))

CATCH (runtimeerror er)

   MessageBox("Runtime Error", er.GetMessage())

END TRY

Example 2

This example catches and displays a user error message from the Clicked event of a button that calls the user-defined function, wf_acos. The user-defined function catches a runtime error—preventing the application from terminating—and then sets the message for a user object, uo_exception, that inherits from the Exception object type:

TRY

   wf_acos()

CATCH (uo_exception u_ex)

   messageBox("Out of Range", u_ex.GetMessage())

END TRY

Code for the wf_acos function is shown in the SetMessage function.