By default, the The AllowCopyPaste property is exNoCopyPaste (all copy, cut, and paste operations are disabled). The AllowCopyPaste property specifies whether the control automatically handles Copy (CTRL + C), Cut (CTRL + X), and Paste(CTRL + V) operations. 

Keyboard Shortcuts:

• CTRL + C, copies the selected items to the clipboard
• CTRL + X, cuts the selected items, removing them from the control and placing them in the clipboard
• CTRL + V, pastes the clipboard content into the control
• CTRL + SHIFT + V, pastes the clipboard content before the focused item instead of after it (default behavior)

You can use any of the following methods to programmatically perform Copy, Cut, or Paste operations on the selected items:

• CopySelection, copies the selected items to the clipboard, allowing them to be pasted elsewhere without removing them from the control
• CutSelection, cuts the selected items, removing them from the control and placing them in the clipboard. These items can be pasted later using the Paste method
• Paste, pastes the items from the clipboard into the control at the appropriate position based on the current selection and focus

For example:

• exAllowCopy, Specifies that only the Copy operation is allowed. When the user presses CTRL + C, the selected content is copied to the clipboard, but Cut and Paste are not permitted.
• exAllowCopy + exAllowCut + exAllowPaste, specifies that Copy, Cut, and Paste operations are all enabled. Users can:

  Press CTRL + C to copy the selected content.
  Press CTRL + X to cut (remove) the selected content.
  Press CTRL + V to paste content from the clipboard into the control.

This flexible approach allows developers to configure clipboard functionality based on their specific needs.