Error handling

Error handling is a very important part of the interface.

The error handling is done using 2 steps

# Step 1

Some functions return a int. If this int is equal to -1 no problems were detected.

If it was different from -1 a error was found and the caller needs to react.

Not all functions returns a errorindex. If a problem was found after calling these functions use GetErrorIndex to check if a problem was found.

# Step 2

The function GetErrorMessage lets the caller retrieve a string with a error message to aid the user to pinpoint the problem.

The function GetErrorIndex lets the user retrieve a int that indicate the number of the error.

List if functions: