Object Querying Quick Reference

The following table lists methods that you can use to query an object.

Statement	Purpose	Reference
If Typeof	Determines if an object is of a given class.	Is Object Of Class Method
IsDate	Determines if an expression evaluates to a date that Oracle’s Siebel VB allows.	Is Expression a Date Method
IsEmpty	Determines if a variant has been set.	Is Variable Set Method
IsMissing	Determines if an optional argument for a procedure is missing.	Is Optional Argument Missing Method
IsNull	Determines if a variant contains a NULL value.	Is Variable Null Method
IsNumeric	Determines if a value is a valid number.	Is Variable Numeric Method