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    <p>When SP_Search is the TAdoStoredProc and has an OnAfterScroll property, all you need to do is:</p> <pre><code>SP_Search.OnAfterScroll := SP_SearchAfterScroll; </code></pre> <p>I am assuming that you used the correct signature for SP_SearchAfterScroll. That is to say that the OnAfterScroll property has a type looks like:</p> <pre><code>TScrollEvent = procedure(DataSet: TDataSet) of object; </code></pre> <p>If the OnAfterScroll property has a type that differs from this, you will need to make sure that your SP_SearchAfterScroll procedure matches the parameters in that type.</p> <p><strong>Edit</strong></p> <p>In the comments Mikayil asked </p> <blockquote> <p><code>SP_Search.AfterScroll := SP_SearchAfterScroll(SPSearch)'</code> the compiler complains saying incompatible types TNotifyEvent and procedure. But when I write <code>SP_Search.AfterScroll := SP_SearchAfterScroll</code> it works. What's the difference?</p> </blockquote> <p>I hadn't gotten round to answering that and in the mean time <strong>Mikey</strong> explained it very well, so for (easier) future reference I am including his explanation up here:</p> <blockquote> <p><code>SP_Search.AfterScroll :=</code> that code assigns a function to handle the event when it fires - you are not making a call to SP_SearchAfterScroll at 'assign time' just assigning a value to a variable, so you don't pass parameter. Parameter is needed when call is made - when event fires then caller will assign parameter with the right value. When you pass the parameter,compiler assumes you are calling the function, not assigning it, so you get incompatible types error. When you simply assign the function without the parameter, compiler understands you're assigning, not calling the function.</p> </blockquote>
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    1. USMarjan Venema
    1. USMarjan Venema
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    1. COThank you Marjan, that did my job. But I wonder one thing. When I write SP_Search.AfterScroll:=SP_SearchAfterScroll(SPSearch) the compiler complains saying incompatible types TNotifyEvent and procedure. But when I write SP_Search.AfterScroll:=SP_SearchAfterScroll it works. What's the difference?
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      1. USMikayil Abdullayev
    2. COSP_Search passes the dataset when it calls the event internally
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      1. USChristopher Chase
    3. COOK, thanks Chris.
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      1. USMikayil Abdullayev
 

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