// 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: [url]http://tinyurl.com/78pv[/url]
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;