hello,
  I have a MDI application...
in the mdi form, I have some comboboxes. picking items in the comboboxes
(OnChange) will affect the active MDIChildwin, and then SetFocus back to the
MDIChild. no problem at all.

but, if I change the items property or ItemIndex property(to update the list
and default to 0), I cannot programmatically set focus to the MDI child. I
tried
ActiveMDIChild.SetFocus;
and/or
TMyChildWin(ActiveMDIChild).scrollbar1.SetFocus;
apparently the focus is set correctly, but pressing Page up/down, arrow key
still affect the combobox on MDIparent, not the child's scrollbar.

only a mouse click on the scroll bar will correctly set the focus, no matter
the scrollbar's up, down or position button.

I tried to post mouseup, mousedown messages to the scrollbar, no luck.
any hints?

"Ka Chun, Cheng" <kccheng_gog...@biblecrawler.com> wrote:

This is not very clean. The problem is that you are still caught in a
focus transition. This code should allow the transition to occur as
soon as the first has cleared:

  PostMessage(ActiveMDIChild.Handle, WM_SETFOCUS, 0, 0);

Good luck.

Kurt

thanks it work! so the trick is to pend the setfocus in the end of message
queue, instead of doing it right aways

"Ka Chun, Cheng" <kccheng_gog...@biblecrawler.com> wrote:

Exactly. Windows becomes very confused if you attempt to change the
focus while Windows is already changing the focus.

Good luck.

Kurt