Nz Method
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Use this method to return zero, a zero-length string (" "), or another specified value when a value is Null. For example, you can use this function to convert a Null value to another value and prevent it from propagating through an expression. Returns a Variant.
expression.Nz(Value, ValueIfNull)
expression Required. An expression that returns a DataSourceControl object.
Value Required Variant. The value to convert.
ValueIfNull Optional Variant. Value to return if the Value argument argument is Null. This argument enables you to return a value other than zero or a zero-length string.
Remarks
This method is useful for expressions that may include Null values. To force an expression to evaluate to a non-Null value even when it contains a Null value, use the this method to return a zero, a zero-length string, or a custom return value.
For example, the expression 2 + varX
will always return a Null value when the VariantvarX
is Null. However, 2 + MSODSC.Nz(varX)
returns 2.
In the next example, the optional argument supplied to the Nz method provides the string to be returned if varFreight
is Null.
varResult = MSODSC.Nz(varFreight, "No Freight Charge")