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implementation
uses WinSvc;
{$R *.dfm}

procedure TForm2.Button1Click(Sender: TObject);
var
    ss:SERVICE_STATUS;
    V_SC_HANDLE:SC_HANDLE;
    V_SC_HANDLE2:SC_HANDLE;
    PC:PChar;
begin
PC :='';
V_SC_HANDLE:=OpenSCManager(nil,nil,SC_MANAGER_ALL_ACCESS);
V_SC_HANDLE2:=OpenService(V_SC_HANDLE,'DEIN_SERVICE_NAME',SERVICE_START);
StartService(V_SC_HANDLE2,0,PC);
CloseServiceHandle(V_SC_HANDLE2);
CloseServiceHandle(V_SC_HANDLE);
end;