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.NET Forum / Languages / Managed C++ / February 2005Scrollbar of a CComboBox
Hi, I'd like to know if there's a way to subclass the scrollbar of a CComboBox control? Thanks in advance, David > Hi, > I'd like to know if there's a way to subclass the scrollbar of a CComboBox > control? No.  SignatureJeff Partch [VC++ MVP] Can you please explain, why not? :-( > Can you please explain, why not? :-( Because a window scrollbar is not a window itself. SignatureJeff Partch [VC++ MVP] Is there no way of making it a window? It should have a handle, no? > Can you please explain, why not? :-( Some scrollbars are windows and some are not. If you create a window with the WS_HSCROLL or WS_VSCROLL styles then that window gets "standard" scrollbars that are not separate controls, they are just part of the non-client portion of the window that contains them. This is the case for a combobox. So, there's totally no way of accessing the scrollbars, and therefore no way to perform any custom-drawing on them? How are XP styles handled, giving those scrollbars a whole different look than the standard, then? "Mike Martin" <nobody@nowhere.com> wrote: OtslH0RHFHA.3588@TK2MSFTNGP14.phx.gbl... >> Can you please explain, why not? :-( > [quoted text clipped - 4 lines] > a > combobox. > So, there's totally no way of accessing the scrollbars, and therefore no way > to perform any custom-drawing on them? > How are XP styles handled, giving those scrollbars a whole different look > than the standard, then? It is handled by (I think) the WM_NCPAINT code for the listbox window that goes with the combo box. >> So, there's totally no way of accessing the scrollbars, and therefore >> no way to perform any custom-drawing on them? There is. Catch combobox's WM_NCPAINT and play with it as you wish. >> How are XP styles handled, giving those scrollbars a whole different >> look than the standard, then? JW> It is handled by (I think) the WM_NCPAINT code for the listbox JW> window that goes with the combo box. Rather by DefWindowProc, I think. SignatureSerge
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