mfc, How can I intercept the code when a scrollbar is enabled/disabled?

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mfc >> How can I intercept the code when a scrollbar is enabled/disabled?

by SnVhbiBEZW50 » Mon, 27 Mar 2006 06:53:34 GMT

Hi,

I have an MFC/ATL EXE using MDI which is misbehaving when the MDI child form
moves towards the edge of the MDICLIENT window. I need to intercept when the
scrollbar is enabled and disabled to see if I can figure out why it is
happening so.

I am aware of the functions ShowScrollBar and EnableScrollBar, both in Win32
and MFC. Are these the only functions capable of showing/enabling scrollbars?
If so, how can I intercept calls to them?


--
Thanks in advance,

Juan Dent, M.Sc.

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mfc >> RE: How can I intercept the code when a scrollbar is enabled/disabled?

by v-terryf » Mon, 27 Mar 2006 17:00:34 GMT


Hi Juan,
Welcome to MSDN Newsgroup!

You also can use the following API to control the scrollbar, just only pass
the HWND parameter to them.
EnableScrollBar
GetScrollBarInfo
GetScrollInfo
GetScrollPos
GetScrollRange
ScrollDC
ScrollWindow
ScrollWindowEx
SetScrollInfo
SetScrollPos
SetScrollRange
ShowScrollBar

I hope the above information is helpful for you. Thanks!

Best Regards,

Terry Fei[MSFT]
Microsoft Community Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)


--------------------
enabled/disabled?
form
the
Win32
scrollbars?



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mfc >> How can I intercept the code when a scrollbar is enabled/disabled?

by AliR » Tue, 28 Mar 2006 05:50:06 GMT

You can always catch the WM_SIZE or WM_SIZING messages, one of the paramters
is the size of the window. If that size is smaller than the size returned by
the views GetTotalSize(...) then it will display the scrollbar.

for Instance, lets say that your window is large enough to not need a
scrollbar. and you are making it smaller

void CMyView::OnSize(.....,int cx,int cy)
{
CSize Size = GetTotalSize();
if (Size.cx > cx || Size.cy > cy)
{
//the scrollbar will be displayed once this function exits
}
CFormView::OnSize(....);
}

AliR.



form
the
Win32
scrollbars?



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