MyGUI crashes when drawing widgets

When I add so many items to a list, MyGUI always crashes. I think because I add item so fastly. If I add "Sleep(50)" after each time I call "listPtr->addItem", it runs better, but sometimes it still crashes.
Please help me! Anyone knows about this problem?

Anyone know about this problem? Please help for him.

Give us some code to look at.
Or at least some more information.

I am sorry. The root cause is not because of updating GUI too fastly.
My problem is: I am trying to update GUI from another thread. MyGUI often cashes when I use another thread to update GUI. Anybody have experience with this problem? Please help me!!!

Luồng khác ở đây là gì ? Bạn có thể đưa một số code lên không ? Như thế sẽ tốt hơn, để mọi người cùng giải quyết...

Here is the example code:

void ThreadList(void *param)
{
MyGUI::ListPtr lst = (MyGUI::ListPtr)param;
bool add = true;
while (1)
{
Sleep(1000);
if (add)
{
char buff[100];
for (int i = 1; i <= 50; i++)
{
sprintf(buff, "Item %d", i);
lst->addItem(buff);
//Sleep(50); //Uncomment this line, it works better but somtimes still crashes
}
}
else
{
lst->removeAllItems();
}
add = !add;
}
}

void DemoKeeper::createScene()
{
MyGUI::ListPtr lst = mGUI->createWidget<MyGUI::List>("List", 50, 50, 300, 500, MyGUI::Align::Default, "Main");
HANDLE h = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ThreadList, lst, 0, NULL);
}


I have also the same bugs.

When we set list item into thread, we will be crashed. I think the reason is 2 thread: Main thread to draw when we call addItem of ListPtr and My thread.

Anyone know about this problem? Please helppppppppppp. Thank you very much.

use mutex

Where to enter and leave mutex?