Indent block selected text

[blazar]

I was using the function of block selected text on my windows version of Code::Blocks 10.05.
My OS is Windows 7 Professional 32bit.

But it behaves strangely, that is, I expected that use alt+mouse select text to select a block, and then use tab to indent the block only.
Somehow it overwrite the block text, as if the mode is switch to overwrite. I tried both insert/overwrite mode indent block behaves same.

I remember long time ago I could use this feature properly.

Is there some setting I modified to cause this issue, or my memory was wrong?

I have searched the forum, the most related post seems about wxScintilla, but I don't have that in plugin list. (Is that a plugin?)
The post is http://forums.next.codeblocks.org/index.php/topic,1482.0.html

Thanks.

[Jenna]

wxScintilla is the wxWidgets-wrapper around scintilla, which is the editor-component we use.
I just tested it and it happens the same way for me.

I get the same behaviour with the wxSTC-example (wxWidgets 2.9 scintilla-wrapper) and scite an editor from the scintilla makers (not using wxWidgets), so it's either configurable or not implemented.
I will loook into the documentation.