Fórum Click direito do mouse e abra um menu popup #262536

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
function MouseSwapButtons(const Swap: boolean): boolean;
begin
  Result := Windows.SwapMouseButton(LongBool(Swap));
end;

function MouseSwappedButtons: boolean;
begin
  Result := GetSystemMetrics(SM_SWAPBUTTON) <> 0;
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
 if MouseSwappedButtons then
   showmessage(´trocado´)
   else
   showmessage(´correto´)
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
   MouseSwapButtons(true);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
   MouseSwapButtons(false);
end;

end.

type
  TSeuForm = class(...
  ...
  private
    FUltimoX, FUltimoY: Integer;
...
// no evento OnMouseDown do seu TImage
procedure TSeuForm.Image1MouseDown(...
begin
  FUltimoX := X;
  FUltimoY := Y;
  ...
end;

// no evento OnClick do seu TImage...
procedure TSeuForm.Image1Click(...
begin
  SeuPopup.Popup(FUltimoX, FUltimoY);
end;

var
  Pt: TPoint;
begin
GetCursorPos(Pt);
PopupMenu.Popup(Pt.x, Pt.y);