Delphi Basics : GetLastError command

DelphiBasics

GetLastError
Function

Gives the error code of the last failing Windows API call

System unit

function GetLastError():Integer;

Description

The GetLastError function returns the value of the last failed Windows API call.

It is useful for many SysUtils routines, such as illustrated in the example.

Related commands

IOResult

Holds the return code of the last I/O operation

Download this web site as a Windows program.

Example code : Try to delete a non-existant file and report the error code

begin
  if DeleteFile('CanDeletMe.txt')
  then ShowMessage('File deleted OK')
  else ShowMessage('File not deleted, error code = '+
                   IntToStr(GetLastError));
end;

Show full unit code

File not deleted, error code = 2