OnChange event occurs when the user changes the text displayed in the edit region.
We write an OnChange event handler to take specific action immediately after the user edits the text in the edit region or selects an item from the list. The Text property gives the new value in the edit region.
Note: OnChange only occurs in response to user actions. Changing the Text property…
OnClick event occurs when the user clicks the control.
We use the OnClick event handler to respond when the user clicks the control. If the control has an associated action, and that action has an OnExecute method, the action’s OnExecute method responds to click…
BiDiMode property or DelphiVCL.Application.BiDiMode is used to indicate the layout of the application when running under Middle Eastern versions of Windows.
Use BiDiMode to specify the bi-directional mode for the application. The bi-directional mode controls the…
BiDiKeyboard property or DelphiVCL.Application.BiDiKeyboard is used to specify the name of the keyboard map that should be used in middle-east locales when text reads from right to left.
This name is a string composed of the hexadecimal value of the language identifier (low word) and a device identifier (high word). For example, Saudi Arabian Arabic has a language identifier of 0x0401, so…
BeginInvoke method or DelphiVCL.Application.BeginInvoke is used to perform an asynchronous call to the method specified by either AProc or AFunc.
The AContext parameter specifies the context where the method executes in. This context corresponds to the main thread. In…
BeforeDestruction method or DelphiVCL.Application.BeforeDestruction is used to respond before the first destructor executes.
BeforeDestruction is called automatically before the object’s first destructor executes. Do not call it explicitly in your…
AutoDragDocking property or DelphiVCL.Application.AutoDragDocking is used to indicate whether dragged windows are automatically docked.
Set AutoDragDocking to enable drag-and-dock behavior when windows are dragged. When AutoDragDocking is true, dragged windows are automatically docked when the mouse is released over a docking site. When AutoDragDocking is false, dragged windows are only…
TColorBoxStyle specifies how a color box control displays its selections.
The following table lists the possible values of TColorBoxStyle:
Style
Meaning when included
cbStandardColors
The color box lists the first 16 color constants from the…
Assign method or DelphiVCL.Application.Assign is used to copy the contents of another similar object.
Assign copies properties and other attributes of the specified Source object to the current object.
Most objects override Assign to handle the assignment of…
AllowTesting property or DelphiVCL.Application.AllowTesting is used to represent information for the IDE.
AllowTesting used for internal use only.
Let’s browse all the properties, methods, and built-in properties of the DelphiVCL.Application.AllowTesting using dir() command:
import DelphiVCL
dir(DelphiVCL.Application.AllowTesting)
See the responses in our…
