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9.6.3 Direction Property

Indicates whether the Parameter object represents an input parameter, an output parameter, or both, or if the parameter is the return value from a stored procedure.
 

Return Values

Sets or returns one of the following ParameterDirectionEnum values
 

Constant Description
adParamInput
 
Default. Indicates an input parameter.
 
adParamOutput
 
Indicates an output parameter.
 
adParamInputOutput
 
Indicates a two-way parameter.
 
adParamReturnValue
 
Indicates a return value.
 

Remarks

Use the Direction property to specify how a parameter is passed to or from a procedure. The Direction property is read/write; this allows you to work with providers that do not return this information or to set this information when you do not want ADO to make an extra call to the provider to retrieve parameter information.
 
Not all providers can determine the direction of parameters in their stored procedures. In these cases, you must set the Direction property prior to executing the query.
 

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