ListBoxのエラーについて

[alphard]

Thank you for the reply. tuntime is as follows.

Curl® RTE
build：7.0.5
support API version： 7.0.5, 5.0.4, 4.0.3, 3.0.8
debug API version： 7.0, 5.0

Windows7(32bit)
IE8.0.7601.17514

----------------------------
{curl 7.0 applet}
{curl-file-attributes character-encoding = "utf8"}
{ListBox}
----------------------------
CTRL-Right-Click -> OK
CTRL-Right-DblClick -> OK
Right-Click -> OK
Right-DblClick -> OK

CTRL-Left-Click -> OK
CTRL-Left-DblClick -> NG (NullDereferenceException)
Left-Click -> OK
Left-DblClick -> NG (NullDereferenceException)




----------------------------
{curl 5.0 applet}
{curl-file-attributes character-encoding = "utf8"}
{ListBox}
----------------------------
CTRL-Right-Click -> OK
CTRL-Right-DblClick -> OK
Right-Click -> OK
Right-DblClick -> OK

CTRL-Left-Click -> OK
CTRL-Left-DblClick -> OK
Left-Click -> OK
Left-DblClick -> OK


Do you think that it is a bug?