question: what is the stack size in MFC objects?

Hi All

I have two small questions,

1. about the stack/heap size allowed in the MFC class like the CDialog class object

2. it safe to use CString class, some times i getting error concerning the stack when using the CString class.

Pascal

AFAIK stack and heap is not associated to any objects. The stack memory is allocated while we creates a thread. The default stack and heap size is 1 MB. You can specify the stack size while creating a thread/fork.
If you are building an EXE, you can set the size of stack in linker options using /STACK option.
you can specify the heap size using /HEAP:reserve[,commit]

This article would help you to know something more about different type of Heaps

it safe to use CString class, some times i getting error concerning the stack when using the CString class

What kind of errors There shouldn't be any. If you have errors, than it's likely that somehow you alter the stack (like for example writing arrays beyond their bounds) in some other part of the code.

A common cause of errors concerning the stack is recursion. You might have an infinite loop that includes recursion.