[mapguide-users] Need help with IF-statment in Tool Tip

[Kratz]

I cant understand how this If-statement works.... 

I thought the [condition] was integer based. ex Length(BYGGINV_1)>0 
But obviously not... 

Could someone help explain how this If-statement work or better up how I can
find out whether the atribute contains any text (string) or not! 

Ex of how my table looks like:
http://n2.nabble.com/file/n3993782/Tabel.bmp 
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