an instance is a representation in memory of a particuliar type (class, struct, union, native type). when you write int i1 = 4, i2 = 5;, i1 and i2 are 2 instances of an int. the context is all that can interract with the program and affect the behavior of it (variables values, thread states...) TOXCCT >>> GEII power [toxcct][VisualCalc]

Hi I know that the answer is related to HIGH-RESOLUTION-TIMER which sets windows timer exactly in correct 1 millisecond intervals. I don't know how to use or set it, you can search the internet. but I know that all mediaplayers, use this for audio/video sync. So search the internet for High Resolution Timer. hope it helps

Thanks for all i got the difference. Regards Anil Kumar

Generally the default structure alignment (which you should use unless there is a compelling reason not to) is 8 bytes. This aligns all basic data types (up to doubles) to even multiples of their size. Example (using 8 byte alignment): struct test { char a; int b; WORD c; char d; double e; }; The offset addresses are: a = 0 b = 4 c = 8 d = 10 e = 16 Total size of the structure: 24 bytes Notice there is some wasted space in there. You can add some variables to this and not increase the size of the structure at all. The following structure is still 24 bytes in size, but is now fully packed. struct test2 { char a; char a2; WORD a3; int b; WORD c; char d; char d2; int d3; double e; };

Hi MAximilien, So you mean to say that if Application is run ising CtrlF5 then some variables does take garbage value and may be the possibility of the crash. Anyway thanks for the reply i will verify in my code all the pointers and variables to initialize NULL and 0s. thanks Anil Kumar