Re: what is _cast

Thanks

oLb:CurrentItemNo sems to be working now.  I'm almost sure I tried it
before, but perhaps something else was broken at the time!

"NSG" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Ian,
>
> From memory _cast is used for pointer type conversions.  Put simply cast
> changes a variable from one type to another.  If you're just learning then
> you probably don't need it.
>
> As for your listbox problem very simple. You can assign values:-
>
>     oDCMyListbox:TextValue:="This is the text displayed in the listbox"
>
> similar
>
>     oDCMyListbox:CurrentItem:="This is the text displayed in the listbox"
>
> or
>
>     oDCMyListBox:Value:="This is the return value of the list box"
>
> or
>
>     oDCMyListBox:CurrentItemNo:=99 -- numeric value representing position
in
> the list.
>
> "Ian Henderson" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > Upfront apology for yet another newbie ques. + rant !
> >
> > I  was looking for a way to set the currently selected item for a
listbox
> > from a method (as opposed to responding to a user click).
> > After much trial and error,  tedious searching the NGs, win32SDK and Vo
> SDK
> > I finally found somethoing that works:
> >
> > SendMessage( SELF:oDcMyListbox:Handle() , LB_SETCURSEL  , DWORD(_CAST,
> > nSel-1 ) , 0)
> >
> > I have to use nSel -1 because, acording to win32 SDK the listbox is zero
> > based.
> >
> > This i arrived at mainly through trial and error and reading the docs,
> > loking at the SDKs.  However I don't like to use stuff i don't fully
> > understand.
> >    So ... what the heck is  _CAST, it doesn't seem documented anywhere.
> >
> > BTW did any of you find, when you were first learning the language, as I
> am,
> > that  as great and powerful as it is, VO developers left out a lot of
> basic
> > stuff that you had to figure out yourself?
> > Take the eg just mentioned. Most other environments would likely allow
you
> > to set a listbox simply with something like:
> > oListBox:CurSelect := nSel     It would be so obvious and intuitive.
> >
> > Is it that the language was pitched at mainly C or C++ programmers
> familiar
> > with windows api experience? Or is it that a lot of stuff was left out
due
> > to bringing it to market? Or was it purposely designed with minimal
> > functionality (clutter) in some of  the basic classes?
> > Or maybe I'm just ranting  because it took so long to do something
pretty
> > basic.  <bg>
> >
> > Regards
> > IanH
> >
> >
> >
>
>