Probleme mit Hooks

[Alex_ITA01]

ich habe doch oben den kompletten source stehen...
Ich werde ihn nochmal Posten:

Delphi-Quellcode:

unit HintCBx;

interface

uses
  SysUtils, Classes, Controls, StdCtrls, Messages, Windows, Graphics, ExtCtrls;

const
  WM_HINT = WM_USER + 1;

type
  THintCBx = class(TCheckBox)
  private
    { Private-Deklarationen }
    HintWnd  : THintWindow;
  protected
    { Protected-Deklarationen }
  public
    { Public-Deklarationen }
    function GetHandle : HWND;

    procedure WMHint(var Message: TWMMouseMove); message WM_HINT;

    Constructor Create(AOwner:TComponent); override;
    Destructor Destroy; override;
    procedure  Loaded; override;
  published
    { Published-Deklarationen }
  end;

  function  MouseProc(nCode : Integer; wParam: WPARAM; lParam : LPARAM): LRESULT; stdcall;

var
  MouseHook     : HHOOK;
{ ---------------------------------------------------------------------------- }
procedure Register;
{ ---------------------------------------------------------------------------- }
implementation
{ ---------------------------------------------------------------------------- }
procedure Register;
begin
  RegisterComponents('Beispiele', [THintCBx]);
end;
{ ---------------------------------------------------------------------------- }
{ THintCBx }
{ ---------------------------------------------------------------------------- }
function MouseProc(nCode : Integer; wParam: WPARAM; lParam : LPARAM): LRESULT; stdcall;
var
  MPos : TPoint;
  Komp : TControl;
begin
  if (wParam = WM_MOUSEMOVE) then
  begin
    GetCursorPos(MPos);
    
    Komp := FindDragTarget(MPos, True);

    if Test.GetHandle <> 0 then
    begin
      //SendMessage(ControlHandle,WM_MOUSEMOVE,wParam,lParam);
      SendMessage(Test.GetHandle,WM_HINT,wParam,lParam);
    end;
  end;
  Result := CallNextHookEx(MouseHook,nCode,wParam,lParam);
end;
{ ---------------------------------------------------------------------------- }
constructor THintCBx.Create(AOwner: TComponent);
begin
  inherited;
  HintWnd := THintWindow.Create(Self);
  HintWnd.Color := clInfoBk;
  ShowHint := True;
  MouseHook := SetWindowsHookEx(WH_MOUSE, @MouseProc, 0, GetCurrentThreadId());
end;
{ ---------------------------------------------------------------------------- }
destructor THintCBx.Destroy;
begin
  HintWnd.Free;
  if MouseHook <> 0 then
    UnhookWindowsHookEx(MouseHook);
  inherited;
end;
{ ---------------------------------------------------------------------------- }
function THintCBx.GetHandle: HWND;
begin
  Result := Self.Handle;
end;
{ ---------------------------------------------------------------------------- }
procedure THintCBx.Loaded;
begin
  Inherited Loaded;
  if ComponentState = [csDesigning] then Exit;
end;
{ ---------------------------------------------------------------------------- }
procedure THintCBx.WMHint(var Message: TWMMouseMove);
var
  rec : TRect;
  MPos: TPoint;
  tmpHint : String;
begin
  if Assigned(HintWnd) then
  begin
    tmpHint := Hint;
    GetCursorPos(MPos);
    MPos := ScreenToClient(MPos);

    rec := Rect(Self.Left, Self.Top, Self.Left + Self.Width, Self.Top + Self.Height);
    if (PtInRect(rec, point(MPos.X + Self.Left, MPos.Y + Self.Top))) and (not Self.Enabled) and (Self.ShowHint) then
    begin
      GetCursorPos(MPos);
      HintWnd.Color := clInfoBk;
      HintWnd.ActivateHint(Rect(MPos.X + 15, MPos.Y, MPos.X + 20 + HintWnd.Canvas.TextWidth(tmpHint), MPos.Y + 15), tmpHint);
    end
    else
      HintWnd.ReleaseHandle;
  end;
  Message.Result := 1;
end;
{ ---------------------------------------------------------------------------- }

{ ---------------------------------------------------------------------------- }
end.

In der MouseProc experiementiere ich grade noch rum, daher geht das nicht zu compilieren...
Ich brauche dieses Handle der Komponente...

MFG Alex