function CombinedLoopIndex: Integer;
Returns combined loop iteration Index to determine the progress of the computation.
Returns: Int32
When processing a range loop (threaded function has min and max parameters) it is the users responsability to update Thread.LoopIndex variable, if this indicator is required. Example:
IntInterlockedIncrement(Thread.LoopIndex);
This is because the actual loop runs within the users code. This function will return the sum of iterations added to the starting Min value.
In case of a while-loop, the CombinedLoopIndex and CombinedLoopCount returns the same result. The user is not allowed to increase Thread.LoopIndex
In case of a for-loop without specified range the function will return the sum of iterations added to the starting Min value. The user is not allowed to increase Thread.LoopIndex