INFO: 32-Bit Scroll Ranges (104311)
The information in this article applies to:
- Microsoft Platform Software Development Kit (SDK) 1.0
This article was previously published under Q104311 SUMMARY
You can use 32-bit scroll ranges by calling GetScrollPos(); however, you
cannot get 32-bit positions for notifications sent while thumb tracking,
that is, via the SB_THUMBPOSITION message. This is because thumb position
information is not queryable via an application programming interface
(API). You only can obtain the 32-bit scroll information only before or
after the scroll has taken place.
The scroll bar APIs allow setting a scroll range up to 0x7FFFFFFF via
SetScrollRange(), and setting a scroll position within that range using
SetScrollPos(). If the WM_HSCROLL or WM_VSCROLL message is processed, the
information returned for scroll bar position, nPos, is only a 16-bit value.
To obtain the 32-bit information, the GetScrollPos() API must be used.
| Modification Type: | Minor | Last Reviewed: | 7/11/2005 |
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| Keywords: | kbCtrl kbinfo kbScrollBar KB104311 |
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