CTX_Base :: ExecuteFunction - Execute context function
The function provides a C++/OSI interface to the dynamic class library. Typically, the function provides an interface to a context class. When the requested function could not be found, the function returns -1 (not executed). In case of an error, the function returns 1 (error). When being processed successfully, the function returns 0 (no error).
Implementation details
Functions in the dynamic class library have to be defined with following signature:
public: virtual char ExecuteFunction(const char *, unsigned char);
The search sequence for context functions (actions or OSI expressions implemented in context classes) is as follows:
- User implemented context class hierarchy
- OSI context class functions
- Default context actions
- fname
- Function name
The function name is passed as 0-terminated string with a maximum length of 40 characters.
Notes:must be C string
- chk_opt
- Check option
The option forces the function to check the property handle before running executing the function. You can pass NO to avoid unnecessary checking.
Default: NO