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A lot of questions regard threads in Delphi.
One of the more specific questions is how to show progress of the thread.
Updating a progressbar from inside a thread is a mistake.
A solution to this would be to send a synchronized message to the…
This Article will show you how to validate number with TEdit control,
What's the TEdit control?
TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text.