Title: Display an Error Message for an OS Error Code using Delphi
Delphi's SysErrorMessage function converts OS error codes into a string - an error message string that corresponds to the specified OS error code..
GetLastError returns the last error reported by an operating system API call.
Note: calling getLastError resets the operating system error state - do not call it two times "in a row" - the second call will clear the "first" error.
Convert the OS Error Code into a User Friendly Message
Here's a quick example - trying to delete a non existing folder. RemoveDir deletes an existing empty directory. The return value is true if a new directory was successfully deleted, false if an error occurred. Read GetLastError to find out why an error occurred.
RemoveDir('c:\NoSuchFolder') ;
ShowMessage('System Error Message: '+ SysErrorMessage(GetLastError)) ;