EN_CHANGE bei Edit-Feld funzt nicht (WinApi)

[TheGame1492]

hoi,

also wenn man bei meinem Edit-Feld irgendwas eingibt soll das EN_CHANGE Event abgefangen werden aber irgendwie funzt das nicht

hier mein Quelltext:

Delphi-Quellcode:

program Unit1_nvc;


uses
  Windows,
  Messages, CommCtrl,  CommDlg;

{$INCLUDE CompilerSwitches.pas}

const
  ID_Form1 = 101;

  IDC_EDIT1 = 1203;
  IDC_LABEl1 = 1503;


  clSkyBlueBrushTemplate: TLogBrush =
  (
  lbStyle: BS_SOLID;
  lbColor: $00f0caa6;
  lbHatch: 0
  );


var
  Form1IsModeless : bool = false;
  hForm1dlg : dword = 0;

  clSkyBlueBrush : HBRUSH;

  hwndEdit1, hwndLabel1: hwnd;

{$R Unit1_nvr.res}


procedure Form1OnCreate( dhwnd: hwnd );
begin

  hwndLabel1 := CreateWindowEx(0, 'STATIC', 'Eingabe:', SS_LEFT or WS_GROUP or WS_CHILD or WS_VISIBLE,
                               8, 8, 70, 18, dhwnd, IDC_LABEl1, hInstance, nil );



  hwndEdit1 := CreateWindowEx(WS_EX_CLIENTEDGE, 'EDIT', '', WS_VISIBLE or
  WS_CHILD or ES_NOHIDESEL, 8, 25, 245, 21, dhWnd, IDC_EDIT1, hInstance, nil);


end;

{$IFNDEF DELPHI4UP}
const
  ICON_SMALL = 0;
  ICON_BIG = 1;
{$ENDIF}

FUNCTION Form1dlgfunc(dhwnd: hwnd; dumsg: dword; dwparam: wparam; dlparam: lparam): longbool; STDCALL;
var
  iState: Integer;
BEGIN
  result := true;

  CASE dumsg OF
    WM_INITDIALOG:
      BEGIN
        hForm1dlg := dhWnd;
        Form1OnCreate( dhwnd );
      END;
    WM_CLOSE:
      BEGIN
          EndDialog(dhWnd, 0);
      END;

// hier soll das event abgefangen werden

    WM_COMMAND:
    begin
       if IDC_EDIT1 = EN_CHANGE then
        MessageBox( dhwnd, 'test', ' test', 0 );
    end;

    ELSE
      result := false;
  END;
  If (hForm1dlg <> 0) and not (dhwnd = hForm1dlg) then
    If not Result then
      Result := LongBool(CallWindowProc(Pointer(GetProp(dhwnd, 'OldWndProc')), dhwnd, dumsg, dwparam, dlparam));
END;

procedure Form1Show(AParent : dword {= 0});
begin
  If IsWindow(hForm1Dlg) then
    begin
      ShowWindow(hForm1Dlg, sw_ShowNormal);
      Exit;
    end;

  clSkyBlueBrush := CreateBrushIndirect(clSkyBlueBrushTemplate);

  Form1IsModeless := true;
  hForm1Dlg := CreateDialogParam(HInstance, MAKEINTRESOURCE(ID_Form1), AParent, @Form1DlgFunc, 0);
  ShowWindow(hForm1Dlg, sw_ShowNormal);

end;

procedure Form1Close;
begin
  SendMessage(hForm1Dlg, WM_CLOSE, 0, 0);

  DeleteObject(clSkyBlueBrush);
end;

begin
  clSkyBlueBrush := CreateBrushIndirect(clSkyBlueBrushTemplate);

  Form1IsModeless := false;
  DialogBoxParam(HInstance, MAKEINTRESOURCE(ID_Form1), 0, @Form1DlgFunc, 0);

  DeleteObject(clSkyBlueBrush);

end.

was hab ich da falsch gemacht?