Hi, Mr Mike, I'm the chinese guy again..to your response of my last thread: you're very welcome:). We should thank you for your excellent work to help the beginners know the entire game development,That's really helpful:)

Today I found the bug as here mentioned.

That means the program has a heap corruption problem. I found the key code is here:

In function :CMessageBox::CMessageBox(std::wstring msg, std::wstring title, int buttonFlags)

we can found
m_UI.AddButton(..g_pApp->GetString(IDS_CONTINUE).c_str()... );

Use the string.c_str() should be very careful.Look at the function declaretion:

AddButton(...LPCWSTR strText..);
std::wstring GameCodeApp::GetString(const int nID);

when GetString().c_str() passed to AddButton() and after AddButton()'s field, the string is destroyed that means the c_str() pointer is deleted too. But the CMessageBox is still using it.

so that's the problem.
Again, I hope this would help the readers like me searching code problems in this forum.:)

Edit.. oops...I add the

_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_DELAY_FREE_MEM_DF | _CRTDBG_CHECK_EVERY_1024_DF | _CRTDBG_CHECK_CRT_DF);

to the code, it detected another heap corruption..and I don't know why..