Sets the HFMwWorkspace instance to a blank task list with a given name, path, security class, and description, and returns an XML string that represents the task list. For further processing, you can pass this string to ParseWorkspaceDocument.
<HFMwWorkspace>.GetBlankWorkspaceDocument (bstrPath, bstrName, bstrSecClass, bstrDesc)
Returns an XML string that represents the task list. String subtype.