[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'sysutils' (#rtl)

# ShowException

Show the current exception to the user.

## Declaration

Source position: sysutilh.inc line 241

`procedure ShowException(`
`ExceptObject: TObject;`
`ExceptAddr: Pointer`
`);`

## Description

ShowException shows a message stating that a ExceptObject was raised at address ExceptAddr. It uses ExceptionErrorMessage to create the message, and is aware of the fact whether the application is a console application or a GUI application. For a console application, the message is written to standard error output. For a GUI application, OnShowException is executed.

## Errors

If, for a GUI application, OnShowException is not set, no message will be displayed to the user.

The exception message can be at most 255 characters long: It is possible that no memory can be allocated on the heap, so ansistrings are not available, so a shortstring is used to display the message.

## See also

ExceptObject |  | Current Exception object.
ExceptAddr |  | Current exception address.
ExceptionErrorMessage |  | Return a message describing the exception.