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Re: Assigning an event handler at runtime?

On Tue, 26 Aug 1997, Lee Morrison wrote:

> Does anyone know how to set the value of an event (OnClick) belonging to a
> control (TSpeedButton) at runtime?  Since I'am working with a component I
> can't assign it through the Events tab of the Object Inspector.
>
First you must define a TNotifyEvent function in your MainForm's class
as follows.

in .h file:
<html>
<pre>
class TMainForm : public TForm
{
__published:    // IDE-managed Components
    TSpeedButton* SpeedButton1;
    void __fastcall FormCreate(TObject *Sender);

private:        // User declarations

public:         // User declarations
    void __fastcall MyOnClick(TObject *Sender); // The TNotifyEvent
    __fastcall TMainForm(TComponent* Owner);
};
</pre>
</html>

In .cpp
<html>
<pre>
...

void __fastcall TMainForm::FormCreate(TObject *Sender)
{
    ...

    SpeedButton1->OnClick = MyOnClick;

    ...

}

...

void __fastcall TMainForm::MyOnClick( TObject *Sender)
{
    // Place your event Handler code here
}


 \|/  Robert E. Twitty, rtwitty@ushmm.org
--*-- Computer Systems Developer
 /|\  US Holocaust Memorial Museum, (202) 488-6598
</pre>
</html>
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