This function creates a new instance of the Random class, then uses the Next method to generate a random integer between 999 and 9999. Finally, the function returns the generated random number.
You can call this function in your code to generate a random number within the specified range. For example:
Public Function GenerateRandomNumber() As Integer
Dim rnd As New Random()
Dim randomNumber As Integer = rnd.Next(1000, 9999)
Return randomNumber
End Function