Hi Andrea,
Yes, you're right. The auto complete feature for TextBox works only if the
TextBox's Mulitline property is set to false. The following MSDN document
has stated this explicitly:
http://msdn2.microsoft.com/en-us/library/system.windows.forms.textbox.autoco
mpletesource.aspx
In my opinion, auto complete feature makes sense for one line of text,
rather than multiline text. This is maybe why the auto complete feature
doesn't work on multiline TextBox contols.
However, if you do need to support the auto complete feature for multiline
TextBox controls, you may implement it by yourself. I search and find a
auto complete sample for you. Although in this sample the auto complete
function doesn't work when the custom TextBox's Multiline property is set
to true, you can learn the thinking of implementing the auto complete
feature form it.
'Autocomplete Textbox Control'
http://www.codeproject.com/cs/miscctrl/AutoCompleteControl.asp
Hope this helps.
If you have any question, please feel free to let me know.
Sincerely,
Linda Liu
Microsoft Online Community Support
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