Windows - como criar um ponto de restauracao (restore point) |
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The following example demonstrates how to create and cancel restore points. Answer:
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;
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