Programming Reference Manual
 
Syntax
 
IsNumeric(expr)
 
Description
Return the True if expr is a numeric value.
 
Parameter
Description
expr 
A variant expression is a numeric value if it is numeric or string value that represents a number.
See Also
Example
 
Sub Main
    Dim X As Variant
    X = 1
    Debug.Print IsNumeric(X) 'True
    X = "1"
    Debug.Print IsNumeric(X) 'True
    X = "A"
    Debug.Print IsNumeric(X) 'False
End Sub