user: make A->W WM_GETTEXTLENGTH use WM_GETTEXT [try 4]

[Frank Richter]

On 22.09.2005 16:57, Frank Richter wrote:
> Diff to try 3: Use less callbacks, only pass window func. SendMessageW()
> is used in case the func is 0.
> 
> Frank Richter <frank.richter at gmail.com>
> When doing A->W WM_GETTEXTLENGTH, use WM_GETTEXT behind the scenes to
> obtain an exact length. This seems to match the behaviour of recent
> Windowses and as well fixes a couple of regressions (caused by theming
> suddenly making the standard controls Unicode).

Any comments on this one?

-f.r.