How to check if string includes any non-whitespace characters?

[SFRandy]

Is there a simple way to check if a string includes non-whitespace characters? I don't need to know what the character is, just that the string includes a non-whitespace character. For example, I want to know if the string includes any characters other than:

vbCr	Chr(13)	Carriage return character
vbLf	Chr(10)	Linefeed character
vbCrLf	Chr(13) + Chr(10)	Carriage return - linefeed combination
vbNewLine	Chr(13) + Chr(10)	New line character
vbTab	Chr(9)	Tab character
vbBack	Chr(8)	Backspace character