Delphi 无边框窗体移动

在控件的MouseDown事件中加入
if (ssleft in Shift) then
begin ReleaseCapture; Perform(WM_syscommand, $F012, 0);
end;
如form1：
procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if (ssleft in Shift) then
begin ReleaseCapture; Perform(WM_syscommand, $F012, 0);
end;
end;
end.