{1、显示鼠标在 Panel1 中的坐标}
{2、显示是否同时按住了 Shift、Ctrl、Alt}
procedure TForm1.Panel1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
var
List: TStringList;
begin
List := TStringList.Create;
if ssShift in Shift then List.Add('Shift');
if ssCtrl in Shift then List.Add('Ctrl');
if ssAlt in Shift then List.Add('Alt');
if List.Count > 0 then
Panel1.Caption := Format('%s: %d, %d', [List.CommaText, X, Y])
else
Panel1.Caption := Format('%d, %d', [X, Y]);
List.Free;
end;
{向 Panel1 发送 WM_MOUSEMOVE 消息}
{第一个消息参数是 0, 表示没有按任何辅助键}
{第二个消息参数是 0, 相当于把鼠标移动到(0,0)坐标}
procedure TForm1.Button2Click(Sender: TObject);
var
x,y,LParam: Integer;
begin
x := Panel1.ClientWidth div 2;
y := Panel1.ClientHeight div 2;
LParam := y shl 16 or x;
Panel1.Perform(WM_MOUSEMOVE, 0, LParam);
end;
procedure TForm1.Button3Click(Sender: TObject);
const
x = 20;
y = 10;
begin
Panel1.Perform(WM_MOUSEMOVE, MK_SHIFT+MK_CONTROL, y shl 16 or x);
end;