PropertyHandle :: Format - Get formatted string

The function returns a formatted string, where place holders are replaced by values of the current instance or values evaluated from expressions. The function requires a selected instance. When no instance is selected, the function returns NULL.

Parameters passed in the parameter list are interpreted in three steps:

1. The parameter is checked to be an attribute. In this case, the attribute value is replaced in the format string.
2. The parameter is checked to be an option. In this case, the option value replaces the place holder in the format string.
3. The passed value replaces the place holder.

The function returns a 0-terminated string, which is stored in the property handles work area. This might be destroyed after calling the next property handle function with the current property handle.