I need to specify a rectangle on a canvas where drawing is enabled, and outside it is forbidden. For example, in Rect(25, 25, 200, 200) drawing is enabled, and anything drawn outside it is not displayed.
Please note, that the canvas in question is the canvas of a printer.
How can I do that?
Thank you for your help.
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.
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