用ReleaseCapture后不能响应MouseUp

[fzfei2]

procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
ReleaseCapture;
SendMessage(Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
end;

procedure TForm1.FormMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
ShowMessage('UP');
end;
各位帮忙看看要怎么响应MouseUp

[fzfei2]

有那位大侠知道?
自己顶一下

[erhan]

不应该这样用啊
都是先SetCapture
处理完了，再ReleaseCapture