Mega Code Archive

Halt - terminates the program with an optional dialog system unit

procedure Halt ( { ExitValue : Integer } ) ; Description The Halt procedure forces an abrupt termination of the current application. Warning : resources cannot be guaranteed to be freed when calling halt. Optionally, the ExitCode variable may be set by passing an ExitValue. This code is returned to the application invoker as the return code from the application. If ErrorAddr has been assigned a value, when Halt is called, a dialog is displayed showing the ErrorAddr and ExitCode values. After Halt executes, the finalization section of the unit is executed before the program actually terminates. Notes Warning : use only in exceptional circumstances. Related commands Break Forces a jump out of a single loop Continue Forces a jump to the next iteration of a loop Exit Exit abruptly from a function or procedure ExitCode Sets the return code when an application terminates Goto Forces a jump to a label, regardless of nesting RunError Terminates the program with an error dialog Example code : Halt a program with an error dialog var i : Integer; begin // Set up an error address so that halt shows a termination dialog ErrorAddr := Addr(i); // Stop the program with exit code 4 Halt(4); // The following will not be executed ShowMessage('We do not get this far'); end; Show full unit code The program terminates without running the ShowMessage statement. An error dialog is displayed: Runtime error 4 at 0069FC94