Heres one for the gurus - Assume a long string variable is declared locally to a method and is assigned a string and the string variable is then typecast as an integer and used in - say - a windows message by assigning it to the message lparam.
The question is when the message is received by another form / thread is it valid to then typecast the lparam back to a string and use it ? I have tried many variations of this scenario and it seems to work OK but am uneasy about whether or not this is safe. I assume it isn't as the local string variable (which points to the actual string) is on the stack and is not maintained after the method is exited but what I really am concerned about is the reference count for the string - has it been increased by typecasting it to an integer / pointer whatever ... I have used some of Marco Cantu's code to try and examine the strings reference count and it always appears to be -1 if the string is a local variable although it works correctly for field or global. All very confusing :-) I would like to know how the code knows when to inc / dec / dispose the stirng / array reference count. Cheers Paul Lowman _______________________________________________ Delphi mailing list [email protected] http://ns3.123.co.nz/mailman/listinfo/delphi
