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Siebel VB Language Reference > Methods Reference for Siebel VB > Object Querying Methods > Is Variable Null MethodThe Is Variable Null method determines if a variant variable contains a Null value. It returns one of the following values:
A null variant does not contain data. It only identifies a result that is not valid or that is ambiguous. Null is not the same as Empty, which indicates that a variant is not yet set. FormatThe following table describes the arguments that you can use with this method. ExampleThe following example asks for ten test score values and calculates the average. If any score is negative, then it sets the value to Null. This example uses the Is Variable Null method to reduce the total count of 10 scores to only the scores that contain a positive value before it calculates the average: Sub Button_Click |
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