In this post, you’ll learn more about FreeOnRelease method or DelphiVCL.Application.FreeOnRelease is used to free the interface reference for components that were created from COM classes. FreeOnRelease is called when an interface implemented by the component is released. FreeOnRelease is used internally and calls the corresponding interface method. It should not be necessary to call…
In this post, you’ll learn how to use the FreeNotification method or DelphiVCL.Application.FreeNotification to ensure that AComponent is notified that the component is going to be destroyed.
Use FreeNotification to register AComponent as a component that should be…
In this post, you’ll learn more about the GetInterface method or DelphiVCL.Application.GetInterface is used to retrieve a specified interface. GetInterface retrieves the interface designated by a GUID or type name. The basic implementation of GetInterface uses the GUID…
In this post, you’ll learn how to use the GetInterfaceEntry method or DelphiVCL.Application.GetInterfaceEntry to return the entry for a specific interface implemented in a class. GetInterfaceEntry returns the class entry for the interface specified by the IID parameter.
Note:
In Delphi Code, IID can be an interface name. The compiler replaces this name with the actual GUID. COM…
In this post, you’ll learn how to use the GetHashCode method or DelphiVCL.Application.GetHashCode is used to return an integer containing the hash code. By default, calling GetHashCode on an object returns an integer representing the virtual address at which the object…
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This section lists all routines and classes included in Delphi’s VCL, split by categories. You can use these lists to navigate according to your needs.
VCL CategoryUnit(s)Additional ControlsVcl.ActnColorMaps, Vcl.ActnCtrls, Vcl.ActnMan, Vcl.ActnMenus, Vcl.ActnPopup, Vcl.AppEvnts, Vcl.ButtonGroup, Vcl.Buttons, Vcl.CheckLst, Vcl.CategoryButtons, Vcl.Controls, Vcl.CustomizeDlg…
We can use the CreateHandle method or DelphiVCL.Application.CreateHandle to generate a main window for the application if it does not already have one.
Do not call CreateHandle directly. In EXEs, the application’s constructor calls CreateHandle. In DLLs, it does…
In this post, we’ll use the Create method of the DelphiVCL.Application object, & DelphiVCL.Application.Create, to create a new VCL-based application.Do not call Create directly. Each GUI application automatically creates an instance of an application object.
In this post, we’ll use the DialogHandle property or DelphiVCL.Application.DialogHandle provides a mechanism for using non-VCL dialog boxes in an application. Learning how to do it will allow you to easily build GUIs with Python Program Maker.
Use DialogHandle when displaying a modeless dialog box that was created using the CreateDialog API function. Assigning the handle of the modeless…
