problem with accessing value

[DeddyH]

This is not unexpected, you create a new instance, therefore its properties are set to default unless something happens which changes them.

[edit] BTW: You should never compare to true or false, this can lead to unexpected results.
if var = true then -->
if var then [/edit]

[question]

Is it also possible to create a class exactly as it is(not as a new instance), i mean i want to create a class of TCalculation so that i can access any of its variable with the exact value from class of TAccounts

i even dont know whether its possible or not, i was looking in tutorial but dont get any idea yet, can you please help me ?

[DeddyH]

You have 2 different classes derived from TPersistent with similar properties? In that case you can override the "Assign" or even better the "AssignTo"-Method. This should do exactly what you want. There should be examples for both methods in this forum: Assign, AssignTo.

[question]

Thanks, i am looking on it.

By the way, Can you please suggest me, any Book/online learning material to learn Delphi with MYSQL(from beginner to expert), even it need to buy ,i will buy it,but i am looking for it, i have a book but it is in German language, a learning material in English would be easily understable in my situation.