## UserDataMap.ItemSize

### Introduced

v3.0

### Description

Returns the size in bytes (as a Long) of the data attached to a particular component of the user data map.
This is equivalent to retrieving a UserDataItem with UserDataMap.Item and then using the UserDataItem.Size property.
Note: Since Python does not support input parameters on properties, this will fail in Python. Use the Python-compliant UserDataMap.GetItemSize2 method instead.

### C# Syntax

    // get accessor

    Int32 UserDataMap.get_ItemSize( Int32 in_ulIndex );

### Parameters

Parameter | Type | Description
--- | --- | ---
Index | Long | Index of the component within the cluster.

### See Also

UserDataItem.Value UserDataItem.Size UserDataMap.GetItemSize2