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Add error checking when retrieving client data from wxMSW wxListBox.

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Verify if retrieving client data failed which might happen if the index
is invalid for example. This makes code more robust and also consistent with
wxChoice.

Closes #13883.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70415 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2012-01-20 22:11:44 +00:00
parent 85a39457f9
commit 6f46510c80
1 changed files with 9 additions and 1 deletions
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10
src/msw/listbox.cpp
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@ -306,7 +306,15 @@ bool wxListBox::IsSelected(int N) const
void *wxListBox::DoGetItemClientData(unsigned int n) const
{
return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
LPARAM rc = SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
if ( rc == LB_ERR && GetLastError() != ERROR_SUCCESS )
{
wxLogLastError(wxT("LB_GETITEMDATA"));
return NULL;
}
return (void *)rc;
}
void wxListBox::DoSetItemClientData(unsigned int n, void *clientData)