IsNull - Built-in Miscellaneous Function¶
Purpose¶
Returns a boolean indicating if the expression is Null.
Syntax¶
IsNull(exp)
Arguments¶
| Argument | Required | Description |
|---|---|---|
exp |
Yes | Any valid expression |
Returns¶
Variant with a variant (VT_BOOL) value
Example¶
Let sTest = "Test"
Return IsNull(sTest)
The above returns false.
Notes¶
- Technically, the function returns true when the value of the variant variable with the contents of the expressions equals VT_NULL.
- The return value conforms to the standards for variant datatypes