Returns the character length of the most recent string returned from the library by all functions that return Unicode (16-bit) strings.
The value returned is the number of 16-bit characters. So the total byte length will be twice that value.
A few functions return 8-bit strings, the AnsiStringResultLength function must be used to obtain the data length for those functions.
This function is not available in the Delphi edition
This function is not available in the ActiveX edition
int DPLStringResultLength(int InstanceID)