/// <summary>
/// Set a DateTime value
/// </summary>
/// <param name="value">The new value to set.</param>
public void SetDateTime(DateTime value)
{
valueType = (ushort)VarEnum.VT_FILETIME;
PropVariant propVar;
System.Runtime.InteropServices.ComTypes.FILETIME ft = DateTimeTotFileTime(value);
Propsys.InitPropVariantFromFileTime(ref ft, out propVar);
CopyData(propVar);
}