奇怪，有时可以运行，有时调试执行时又运行不下去

[glssky]

前几天运行都没问题，今天怎么运行时会出现错误？
BOOL CMyApp::InitInstance()
{
AfxEnableControlContainer();

// Standard initialization
// If you are not using these features and wish to reduce the size
// of your final executable, you should remove from the following
// the specific initialization routines you do not need.

#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif

CMyDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
}
else if (nResponse == IDCANCEL)
{
}

// Since the dialog has been closed, return FALSE so that we exit the
// application, rather than start the application's message pump.
return FALSE;
}
其中m_pMainWnd = &dlg；语句运行不下去了
出现对话框提示：Unhandle exception in xxx.exe:0XC0000005:Access Violation.
哪位大哥知道是怎么回事帮帮小弟

[孤必有邻]

估计问题会在CMyDlg的构造函数或Create函数中，自己添加的代码有问题

[akiko]

都是向导生成的代码,没问题.先Rebuild All试一下.再有可能得打什么补丁了.

[glssky]

Rebuild All一下确实可以解决问题，akiko谢谢了。这是什么原因呢？做成可执行程序后会不会又出现这种问题啊？