An implementation of Visual Basic that is built into Microsoft products.
If you see vb before a command or value, it often refers to a built-in VBA constant or enumeration. For example, vbCrLf represents a carriage return followed by a line feed, which creates a new line in text. vbTab represents a tab character, and vbYesNo specifies a Yes/No button combination in a message box.
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hth
Marcin