Windows API是否具有滚动条控件？

Question

In Delphi, there is a component called TScrollBox , which allows you to add a scrollbar to a TImage component.

I need to add a scrollbar to an image in pure Windows API. So does Windows API have such a control? All I found is this 1993 article !

If not, then how can I add a scrollbar to my image?

Answer 1

The Windows API provides two types of scrollbars :

One is the standalone Scroll Bar control, that comes with its own window handle.

The other is attached to a window that has the WS_HSCROLL and/or WS_VSCROLL Window Styles . The latter is a nonclient scrollbar and not a control. Consequently it doesn't have a window handle. To manipulate a nonclient scrollbar, pass the window handle of the containing window together with the SB_HORZ or SB_VERT as the nBar parameter to the appropriate scrollbar functions.

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Most complete guide to scrollbars (from The Old New Thing ):

• The scratch program
• Scrollbars, part 2
• Scrollbars, part 3: Optimizing the paint cycle
• Scrollbars, part 4: Adding a proportional scrollbar ( Answer to exercise )
• Keyboard accessibility for scrollbars
• Scrollbars bart 6 - The wheel
• Scrollbars part 7 - Integrality
• Scrollbars part 8 - Integral interactive resizing ( Answer to exercise )
• Scrollbars part 9 - Maintaining the metaphor
• Scrollbars part 10 - Towards a deeper understanding of the WM_NCCALCSIZE message ( Answers to exercises )
• Scrollbars part 11: Towards an even deeper understanding of the WM_NCCALCSIZE message ( Answers to exercise )
• Scrollbars part 12: Applying WM_NCCALCSIZE to our scrollbar sample
• Scrollbars redux: Part 12

Answer 2

是的，Win32定义了滚动条类，在此处记录： https : //msdn.microsoft.com/zh-cn/library/windows/desktop/bb787529.aspx