Reads DWORD values in a property set.
HRESULT ReadDWORD (
[in] Identifier of the property to be read (PROPID is defined in WTypes.h as a ULONG).
[out] Returns the property value.
If successful, returns S_OK; otherwise returns an error code. Returns E_INVALIDARG if the property is not of type DWORD.
A DWORD is defined by Windows as a 32-bit unsigned integer.