2.2.50.2 Globalization
The OLE Automation Protocol interfaces MUST use the WideCharToMultiByte method (as specified in [MS-UCODEREF] section 2) to preprocess strings before they are compared or stored.
Automation string preprocessing MUST conform to the behavior of the WideCharToMultiByte method with the following parameter values:
CodePage: CP_ACP (zero – the current system Windows ANSI code page)
dwFlags: zero or NULL
lpDefaultChar: zero or NULL
lpUsedDefaultChar: zero or NULL