What is the DelphiVCL.Application.OnHelp event?
The OnHelp or DelphiVCL.Application.OnHelp occurs when the application receives a request for Help. You can examine and set it in the IDE software.
How to use the DelphiVCL.Application.OnHelp event properly?
Write an OnHelp event handler to perform special processing when the user requests Help. The HelpContext and HelpJump methods…
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A built-in function object is a wrapper around a C function. Examples of built-in functions are len() and math.sin() (math is a standard built-in module). The number and type of the arguments are determined by the C function.
You can browse all the built-in function objects available to us for windows development inside the DelphiVCL library using the Python dir() command:
import…
The OnException or DelphiVCL.Application.OnException event occurs when an unhandled exception occurs in the application. This is a fundamental error event to understand when you develop Windows software.
How is the DelphiVCL.Application.OnException event used?
Use…
What is an OnGetActiveFormHandle Event in DelphiVCL.Application?
December 26, 2021
OnGetActiveFormHandle or DelphiVCL.Application.OnGetActiveFormHandle is the event triggered when reading the value of the ActiveFormHandle property.
Let’s take a look at all of DelphiVCL.Application.OnGetActiveFormHandle properties, methods, and built-in…
DelphiVCL.BitBtn is a push button control that can include a bitmap on its face. It’s an alternative to the regular button control which can’t directly use graphics on it.
Bitmap buttons exhibit the same behavior as button controls. We use them to initiate actions from forms and dialog boxes.
Bitmap buttons implement properties that specify the bitmap images, along with…
The Alignment or TAlignment property is used to specify how text is aligned within a control. The default value of the Alignment property is taLeftJustify.
These are the possible values of Alignment:
Value
Meaning
taLeftJustify
Align text on the…
The Sender property specifies which component notifies the change link object of changes.
We use Sender to access the component that has changed.
Here is a working example of the implementation of Sender property in DelphiVCL:
# Implementation in Color…
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