The following example demonstrates how to create and cancel restore points.

To create a new System Restore Point in Windows XP, click Start -> All Programs ->
Accessories -> System Tools -> System Restore.

The following two examples show two ways how to do this with Delphi.


{*****************************************************}
{1. Using the Microsoft Scripting Control}

  {
  If you haven't installed the Microsoft Scripting Control yet
  (TScriptControl component), get it
  from http://www.msdn.microsoft.com/scripting/

  Once you've downloaded and run the installation, start Delphi and go to the
  Component | Import ActiveX Control... menu.
  Select "Microsoft Script Control 1.0" from the Listbox amd click "Install"
  to install the component into Delphi's palette.
  What you should end up with now is a TScriptControl component on your ActiveX tab.
  Start a new application, and drop a TButton, and a TScriptControl onto the main form.
  In the OnClick event of Button1, put the following code:
  }

procedure TForm1.Button1Click(Sender: TObject);
var
  sr: OLEVAriant;
begin
  ScriptControl1.Language := 'VBScript';
  sr := ScriptControl1.Eval('getobject("winmgmts:\\.\root\default:Systemrestore")');
  if sr.CreateRestorePoint('Automatic Restore Point', 0, 100) = 0 then
    ShowMessage('New Restore Point successfully created.')
  else
    ShowMessage('Restore Point creation Failed!');
end;

{*****************************************************}
{2. Using the SRSetRestorePoint() API from SrClient.dll}

// Translation from SRRestorePtAPI.h
const
 // Type of Event
 BEGIN_SYSTEM_CHANGE = 100;
 END_SYSTEM_CHANGE  = 101;
 // Type of Restore Points
 APPLICATION_INSTALL =  0;
 CANCELLED_OPERATION = 13;
 MAX_DESC = 64;
 MIN_EVENT = 100;

// Restore point information
type
PRESTOREPTINFOA = ^_RESTOREPTINFOA;
_RESTOREPTINFOA = packed record
    dwEventType: DWORD;  // Type of Event - Begin or End
    dwRestorePtType: DWORD;  // Type of Restore Point - App install/uninstall
    llSequenceNumber: INT64;  // Sequence Number - 0 for begin
    szDescription: array [0..MAX_DESC] of CHAR; // Description - Name of Application / Operation
end;
RESTOREPOINTINFO = _RESTOREPTINFOA;
PRESTOREPOINTINFOA = ^_RESTOREPTINFOA;

// Status returned by System Restore

PSMGRSTATUS = ^_SMGRSTATUS;
_SMGRSTATUS = packed record
    nStatus: DWORD; // Status returned by State Manager Process
    llSequenceNumber: INT64;  // Sequence Number for the restore point
end;
STATEMGRSTATUS =  _SMGRSTATUS;
PSTATEMGRSTATUS =  ^_SMGRSTATUS;

function SRSetRestorePointA(pRestorePtSpec: PRESTOREPOINTINFOA; pSMgrStatus: PSTATEMGRSTATUS): Bool;
  stdcall; external 'SrClient.dll' Name 'SRSetRestorePointA';

// Example how to create and cancel a previous restore point.
// Ref: http://tinyurl.com/78pv

procedure TForm1.Button1Click(Sender: TObject);
const
 CR = #13#10;
var
  RestorePtSpec: RESTOREPOINTINFO;
  SMgrStatus: STATEMGRSTATUS;
begin
  // Initialize the RESTOREPOINTINFO structure
  RestorePtSpec.dwEventType := BEGIN_SYSTEM_CHANGE;
  RestorePtSpec.dwRestorePtType := APPLICATION_INSTALL;
  RestorePtSpec.llSequenceNumber := 0;
  RestorePtSpec.szDescription := 'SAMPLE RESTORE POINT';

  if (SRSetRestorePointA(@RestorePtSpec, @SMgrStatus)) then
  begin
    ShowMessage('Restore point set. Restore point data:' + CR+
      'Sequence Number: ' + Format('%d', [SMgrStatus.llSequenceNumber]) + CR+
      'Status: ' + Format('%u', [SMgrStatus.nStatus]));

      // Restore Point Spec to cancel the previous restore point.
      RestorePtSpec.dwEventType := END_SYSTEM_CHANGE;
      RestorePtSpec.dwRestorePtType  := CANCELLED_OPERATION;
      RestorePtSpec.llSequenceNumber := SMgrStatus.llSequenceNumber;

      // This is the sequence number returned by the previous call.
      // Canceling the previous restore point
      if (SRSetRestorePointA(@RestorePtSpec, @SMgrStatus)) then
        ShowMessage('Restore point canceled. Restore point data:' + CR+
        'Sequence Number: ' + Format('%d', [SMgrStatus.llSequenceNumber]) + CR+
        'Status: ' + Format('%u', [SMgrStatus.nStatus]))

      else
        ShowMessage('Couldn''t cancel restore point.');
    end
    else
      ShowMessage('Couldn''t set restore point.');
  end;
end;