/// <summary>
/// Also opens a style file referred to via the property
/// <see cref="PropertyNaming.StyleFile"/> (if there is such a definition).
/// It then reads the file into a <see cref="StyleFile"/> object for later use.
/// </summary>
/// <returns>The loaded style file (or null if no such file, or it could
/// not be loaded). If the environment variable is undefined, you get back
/// an object that represents an empty style file.</returns>
StyleFile OpenStyleFile()
{
// Get the translation (if any) of the property
// that refers to the standard style file.
IProperty prop = EnvironmentContainer.FindPropertyByName(PropertyNaming.StyleFile);
string stdfile = (prop == null ? null : prop.Value);
if (String.IsNullOrEmpty(stdfile))
return new StyleFile();
// Create a new style file object, and ask it to load the file.
StyleFile file = new StyleFile();
int nStyle = file.Create(stdfile);
// Return the file if it loaded ok
return (nStyle > 0 ? file : null);
}
