The ClassNameIs method or DelphiVCL.Application.ClassNameIs is used to determine whether an object is of a specific type when you develop windows software.
ClassNameIs determines whether an object instance or class reference has a class name that matches a specified string. This is useful to query objects across modules or shared libraries.
Let’s browse all the properties, methods, and…
What Is delphivcl.Picture Used For In Windows Development?
February 18, 2022
DelphiVCL.Picture or TPicture contains a bitmap, icon, metafile graphic, or user-defined graphic. It is used in Windows development to display images to the user as part of the graphical user interface.
DelphiVCL.Picture or TPicture is a TGraphic container, used to hold a…
This Is How TShiftState Works For Windows App Development
February 16, 2022
TShiftState in DelphiVCL indicates the state of the modifier keys – shift/ctrl/alt, the mouse buttons, or touch devices when you are performing Windows app development.
The TShiftState type is used by key-event and mouse-event handlers to determine the state of the…
What Are Bi-Directional Properties In DelphiVCL Applications?
January 28, 2022
What is Bi-Directional (BiDi)?
Some languages do not follow the left to right reading order commonly found in Western languages, but rather use the right to left reading order for words and the left to right reading order for numbers. These languages are termed bi-directional (BiDi) because of this separation. The most common bi-directional languages are Arabic and Hebrew, although other Middle…
Everything You Need To Know About C++ ABI Inside DelphiVCL
January 27, 2022
C++ ABIs or more specifically: DelphiVCL.Application.CPP_ABI_1, DelphiVCL.Application.CPP_ABI_2, and DelphiVCL.Application.CPP_ABI_3 inside DelphiVCL.Application is C++ ABIs (Application Binary Interfaces, which are implemented under the hood, including how parameters…
When you develop windows software use CreateForm method or DelphiVCL.Application.CreateForm to create a new form.
Call CreateForm to dynamically create a form at runtime. Developers do not need to add code for creating most forms, because typically one or more calls to…
For development on Windows OnGetMainFormHandle or DelphiVCL.Application.OnGetMainFormHandle is the event triggered when reading the value of the MainFormHandle property.
Let’s take a look at all of DelphiVCL.Application.OnGetMainFormHandle properties and methods:
import DelphiVCL
dir(DelphiVCL.Application.OnGetMainFormHandle)
See the responses in our Windows command…
What does the OnMessage Event in DelphiVCL.Application do?
January 24, 2022
In Windows application development the OnMessage or DelphiVCL.Application.OnMessage occurs when the application receives a message from either the Windows operating system or another application.
How to use the DelphiVCL.Application.OnMessage event properly?
We use…
During windows development, or in fact any similar apps, use the FreeInstance method or DelphiVCL.Application.FreeInstance to deallocate memory allocated by a previous call to the NewInstance method.
All destructors call FreeInstance automatically to deallocate memory…
In windows app development, the Observers or DelphiVCL.Application.Observers property indicates the TObservers object added to the TComponent.
Observers is a read-only property that returns the TObservers added to the TComponent, in order to use the notifications provided by the observers either with LiveBindings or for the developers’ own purposes.
Let’s browse all the properties…
