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3 lut 2011 · 1. Add a 'embedded form' close method to the main form. 2. Set the embedded's form OnClose handler to this close method.
Now, the next step is to configure the second form: initially, we close the first form, which we can accomplish using the button we created labeled "Close". Afterward, we click on the heading "Unit2" in the Code Editor and press F 12 to display the second form. classes, type TFom.2 — Graphics,
16 lut 2020 · It is better to return to the main form by closing the second form (as in the previous example) and letting focus revert to the main form. It is, however, possible to call the main from from a sub-form, as this example will show.
4 Closing a form Closing a form can be done programatically (calling the Close method), but can also be done by the user if he/she clicks the ’close window’ icon of the window manager. In both cases, two events are fired: OnCloseQuery This event can be used to prevent the form from closing. For this, it has a
The button click should just call Close (for the form) which, if it's the main form, will close the application. That will in turn fire the OnClose event: if you re-Click the button there you are caught in an infinite loop, so don't do that.
Is Close() just trying to close the form before it has fully been created or is it something completely different? I've not been able to reproduce your problem (though in my very small test I have found a little glitch: calling Close in the OnCreate handler is, apparently, ignored).
In this article, various standard components of the Lazarus Component Library (LCL) are examined in more detail, and various important properties are discussed. All of the controls described in this contribution are located on the first tab of the component palette in the Lazarus IDE.
