Hi there:
I developed a little application in Delphi 7 using the unit cwinsrvc, widely used by Delphi programmers. My application only has to test if a service is running. It works in all machines I have tested, including Windows XP and Windows 2000 Advanced Server. The problem is that there is a machine (windows 2000 Advanced Server) in wich my application does not "see" any service... I mean, when I ask if a service is running or stopped, it returns "UNKNOWN". I tested my application in a similar PC (Windows 2000 Advanced Server) and IT WORKS!!! So, what is the problem in an specific machine????
I tried to start a service in that machine in order to obtain an exception with a message, but it didn't raise an exception, so I can see what is the problem...
Can somebody help me, please???? I am sorry about my English.
The code of the Unit I am using is the next (cwinsrvc):
unit cwinsrvc;
interface
uses Windows, SysUtils, WinSvc;
function ServiceGetStrCode(nID : integer) : string;
function ServiceGetStatus(sMachine,sService : string) : DWord;
function ServiceRunning(sMachine,sService : string) : boolean;
function ServiceStopped(sMachine,sService : string) : boolean;
function ServiceStart(sMachine,sService : string) : boolean;
function ServiceStop(sMachine,sService : string) : boolean;
implementation
function ServiceGetStrCode(nID : integer) : string;
var
s : string;
begin
case nID of
SERVICE_STOPPED : s := 'STOPPED';
SERVICE_RUNNING : s := 'RUNNING';
SERVICE_PAUSED : s := 'PAUSED';
SERVICE_START_PENDING : s := 'START/PENDING';
SERVICE_STOP_PENDING : s := 'STOP/PENDING';
SERVICE_CONTINUE_PENDING : s := 'CONTINUE/PENDING';
SERVICE_PAUSE_PENDING : s := 'PAUSE/PENDING';
else
s := 'UNKNOWN';
end;
Result := s;
end;
function ServiceGetStatus(sMachine,sService : string) : DWord;
var
schm : SC_Handle;
schs : SC_Handle;
ss : TServiceStatus;
dwStat : DWord;
begin
dwStat := 1;
schm := OpenSCManager( PChar(sMachine), Nil,
SC_MANAGER_CONNECT);
if(schm > 0)then
begin
schs := OpenService( schm, PChar(sService),
SERVICE_QUERY_STATUS);
if(schs > 0)then
begin
if (QueryServiceStatus( schs, ss)) then
begin
dwStat := ss.dwCurrentState;
end;
CloseServiceHandle(schs);
end;
CloseServiceHandle(schm);
end;
Result := dwStat;
end;
function ServiceRunning(sMachine,sService : string) : boolean;
begin
Result := SERVICE_RUNNING =
ServiceGetStatus(sMachine, sService);
end;
function ServiceStopped(sMachine,sService : string) : boolean;
begin
Result := SERVICE_STOPPED =
ServiceGetStatus(sMachine, sService);
end;
function ServiceStart(sMachine,sService : string) : boolean;
var
schm,
schs : SC_Handle;
ss : TServiceStatus;
psTemp : PChar;
dwChkP : DWord;
begin
ss.dwCurrentState := 1;
schm := OpenSCManager(PChar(sMachine), nil,
SC_MANAGER_CONNECT);
if(schm > 0)then
begin
schs := OpenService(schm, PChar(sService),
SERVICE_START or SERVICE_QUERY_STATUS);
if(schs > 0)then
begin
psTemp := Nil;
if(StartService( schs, 0,psTemp))then
begin
if(QueryServiceStatus(schs, ss))then
begin
while(SERVICE_RUNNING <> ss.dwCurrentState)do
begin
dwChkP := ss.dwCheckPoint;
Sleep(ss.dwWaitHint);
if not QueryServiceStatus(schs, ss) then
begin
break;
end;
if ss.dwCheckPoint < dwChkP then
begin
break;
end;
end;
end;
end;
CloseServiceHandle(schs);
end;
CloseServiceHandle(schm);
end;
Result := SERVICE_RUNNING = ss.dwCurrentState;
end;
function ServiceStop(sMachine,sService : string) : boolean;
var
schm,
schs : SC_Handle;
ss : TServiceStatus;
dwChkP : DWord;
begin
schm := OpenSCManager(PChar(sMachine), nil,
SC_MANAGER_CONNECT);
if schm > 0 then
begin
schs := OpenService( schm, PChar(sService),
SERVICE_STOP or SERVICE_QUERY_STATUS);
if schs > 0 then
begin
if ControlService(schs, SERVICE_CONTROL_STOP,
ss) then
begin
if(QueryServiceStatus(schs, ss))then
begin
while(SERVICE_STOPPED <> ss.dwCurrentState)do
begin
dwChkP := ss.dwCheckPoint;
Sleep(ss.dwWaitHint);
if(not QueryServiceStatus(schs,ss))then
begin
break;
end;
if(ss.dwCheckPoint <
dwChkP)then
begin
break;
end;
end;
end;
end;
CloseServiceHandle(schs);
end;
CloseServiceHandle(schm);
end;
Result := SERVICE_STOPPED = ss.dwCurrentState;
end;
end.