# Function Reference

# _WinAPI_FatalAppExit

Displays a message box and terminates the application

#include <WinAPIProc.au3>
_WinAPI_FatalAppExit ( $sMessage )

## Parameters

$sMessage | The string that is displayed in the message box

## Return Value

None.

## Remarks

An application calls FatalAppExit only when it is not capable of terminating any other way.
FatalAppExit may not always free an application's memory or close its files, and it may cause a general failure of the system.
An application that encounters an unexpected error should terminate by freeing all its memory and returning from its main message loop.

## See Also

Search FatalAppExit in MSDN Library.