aktScreen1 := TBitmap.Create;
  aktScreen2 := TBitmap.Create;
  suchbild1 := TBitmap.create;
  suchBild2 := TBitmap.Create;

  suchbild1.LoadFromFile('C:\Users\blabla\Pictures\i1.bmp');
  suchBild2.LoadFromFile('C:\Users\blabla\Pictures\2.bmp');

procedure TfrmMain.searchInventar(Sender: TObject);
begin
  fstarttimer := GetTickCount;
  ScreenCapture(aktScreen1);
  ScreenCapture(aktScreen2);
  ThreadsRunning := 2;

  // Threads erzeugen aber nicht ausführen
  Thread1 := TImageSearch.Create(true);
  Thread1.OnTerminate := ThreadDone1;
  Thread1.Searchbmp.Assign(suchbild1);
  Thread1.screenbmp.Assign(aktScreen1);
  Thread1.NameThreadForDebugging('Thread1');

  Thread2 := TImageSearch.Create(true);
  Thread2.OnTerminate := ThreadDone2;
  Thread2.Searchbmp.Assign(suchbild2);
  Thread2.screenbmp.Assign(aktScreen2);
  Thread2.NameThreadForDebugging('Thread2');

  // Threads starten
  Thread1.start;
  Thread2.start;
end;

unit imgCompareThread;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls, Vcl.StdCtrls, Vcl.ComCtrls,
  Vcl.Menus,Vcl.ImgList,SelectKit,pictureHelper;

type
  TImageSearch = class(TThread)
  private
    fScreenBMP : TBitmap;
    fSearchBMP : TBitmap;
    fxyPoint : Tpoint;
    { Private-Deklarationen }
  protected
    procedure Execute; override;
  public
    //constructor Create(CreateSuspended : boolean ;var SearchBMP,ScreenBMP : TBitmap;var xyPoint : TPoint);overload;
    constructor Create(CreateSuspended: boolean); overload;
    property ScreenBMP : TBitmap read FScreenBMP write FScreenBMP;
    property SearchBMP : TBitmap read FSearchBMP write FSearchBMP;
    property xyPoint : TPoint read fxyPoint write fxyPoint;
  end;

implementation

{ TImageSearch }

procedure TImageSearch.Execute;
var
  x,y: Integer;
  tempBMP : Tbitmap;
  rectSource,rectDest : TRect;
  toBreak : boolean;
  i: Integer;
  k: Integer;
begin
  toBreak := false;
  // ******************************************************************************
  // Inventar oben links suchen
  // ******************************************************************************
  Try
    // Declaration
    tempBMP := Tbitmap.Create;
    tempBMP.Width := FSearchBMP.Width;
    tempBMP.Height := FSearchBMP.Height;
    tempBMP.PixelFormat := FSearchBMP.PixelFormat;
    for x := 0 to FScreenBMP.Width-tempBMP.Width-1 do
      begin
        if toBreak then break;
        for y := 0 to FScreenBMP.Height-tempBMP.Height-1 do
        begin
          // Ausschnittsbereich festlegen
          rectDest := rect(0,0,tempBmp.Width,tempBmp.Height);
          rectSource := rect(x,y,x+tempBmp.Width,y+tempBmp.Height);
          tempBmp.Canvas.CopyMode := cmSrcCopy;
          // Ausschnittsbereich kopieren rectSource
          tempBmp.Canvas.CopyRect(rectDest,ScreenBMP.Canvas,rectSource);
          //imgTemp.Picture.Bitmap.Assign(tempBMP);
          if Compare2Bitmaps(60,FSearchBMP,tempBMP) = ceOK then
            begin
              toBreak := true;
              fxypoint.x := x;
              fxypoint.y := y;
              with Tform.Create(nil) do
                begin
                  FormStyle := fsStayOnTop;
                  Name := 'frmSelection2';
                  Position := poDesigned;
                  left := x-3;
                  top := y-3;
                  Width := 56;
                  Height := 56;
                  borderstyle := bsNone;
                  color := clWhite;
                  for k := 0 to 5 do
                    begin
                      visible := true;
                      sleep(100);
                      visible := false;
                      sleep(100);
                    end;
                  free;
                end;
              break;
            end;
        end;
      end;
  Finally
    tempBMP.Free;
  End;
end;

constructor TImageSearch.Create(CreateSuspended: Boolean);
begin
  fScreenBMP := TBitmap.Create;
  fSearchBMP := TBitmap.Create;
  inherited Create(CreateSuspended);
end;


end.

Dec(ThreadsRunning);
  xyPoint2 := Thread2.xyPoint;
  showMessage('X2: ' +inttostr(Thread2.xyPoint.X)+' Y2: '+inttostr(Thread2.xyPoint.Y));