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7.0

WMI: Read an array property... how?

Asked by RadikalQ3 in Delphi Programming

Tags: wmi

With this code, I can enumerate the parellel ports.

Im getting the properties Caption and PNPDeviceId but... I want also get the property called 'Capabilities' that is an array of uint16
How can I get these values?

procedure TForm1.Button3Click(Sender: TObject);

  procedure EnumerateParallelPorts(TheList:TStrings);
  var
    oCosas,
    oCosa        : OleVariant;
    services     : OleVariant;
    iTemp        : longword;
    oEnum        : IEnumvariant;
    Locator      : ISWbemLocator;
  begin
    Locator := CreateOleObject('WbemScripting.SWbemLocator') as ISWbemLocator;
    Services := Locator.ConnectServer('.', 'root\cimv2', '', '', '', '', 0, nil);
    oCosas:=Services.ExecQuery('Select * from  Win32_ParallelPort');

    oEnum := IUnknown(oCosas._NewEnum) as IEnumVariant;

    //Get name & PNPDeviceId of the ports
    while oEnum.Next(1,oCosa,iTemp) = 0 do begin
      TheList.Add( Format('Port: %s, DeviceId: %s',[oCosa.Caption,oCosa.PNPDeviceId]) );

      //There are a property called:
      //  Capabilities
      //  Data type: uint16 array
      // I want read its values... How? :?

      oCosa:=Unassigned;
    end;

    oCosas := Unassigned;
    Services:=Unassigned;
  end;

begin
  EnumerateParallelPorts(Memo1.Lines);
end;
 
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Zone: Delphi Programming
Tags: wmi
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Solution Provided By: AndersonCarli
Participating Experts: 2
Solution Grade: A
 
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