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POHow to "notify" parent window about "scroll event" of child window "list box" control in WIN32 API?
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  1. POHow to "notify" parent window about "scroll event" of child window "list box" control in WIN32 API?
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    copied!<p>How to <strong>"notify"</strong> the parent window about the <strong>"scroll event"</strong> of its child window, a <strong>"list box"</strong> control, each time it is scrolled up or down in <strong>WIN32 API</strong>?</p> <p>I am trying to make a <em>dictionary</em> using the <em>WIN32 API</em>. I created a <em>parent window</em>, and then created a child window <em>list box</em> control in it.</p> <p>I want to add <strong>"50 word lists"</strong> at a time to the list box control from the database, so that the application does not take time at all during the start up.</p> <p>And then, I want to keep a track of the <strong>"scroll bar position"</strong> (the <strong>"SCROLLINFO"</strong> structure's <strong>"nPos"</strong> value) of the list box control as the user scrolls up or down the word lists, so that I can call a function that adds 50 more words at the end of the list box when it has been almost scrolled up to the bottom.</p> <p>In the <strong>main window procedure</strong> function, inside the <strong>"switch"</strong> statement I used the <strong>"WM_VSCROLL"</strong> window message hoping to catch the child window list box control’s scroll event. The child window list box control has <strong>"LBS_NOTIFY"</strong> style. But all in vain! The list box control’s scroll event is not being notified to its parent window. The parent window also is not doing anything in the <strong>"WM_VSCROLL"</strong> message for its child window list box control’s scroll event.</p> <p>Please kindly help me, guide me, show me with code examples how to <strong>"notify"</strong> the parent window about the <strong>"scroll event"</strong> of its child window, a <strong>"list box"</strong> control, each time it is scrolled up or down in WIN32 API.</p>
 

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