AfxMessageBox在哪里分配内存

[fecat]

我的程序在调用AfxMessageBox后,发现内存中一局部变量的内存被破坏了,而不调用AfxMessageBox()则没有问题,是怎么回事?

[zhucde]

看看代码

[bluebohe]

肯定是你的程序的问题AfxMessageBox源码如下

int AFXAPI AfxMessageBox(LPCTSTR lpszText, UINT nType, UINT nIDHelp)
{
CWinApp* pApp = AfxGetApp();
if (pApp != NULL)
return pApp->DoMessageBox(lpszText, nType, nIDHelp);
else
return pApp->CWinApp::DoMessageBox(lpszText, nType, nIDHelp);
}

[bluebohe]

DoMessageBox，呵呵，既然你不贴代码的话就让你看一下源代码自己分析
int CWinApp::DoMessageBox(LPCTSTR lpszPrompt, UINT nType, UINT nIDPrompt)
{
// disable windows for modal dialog
EnableModeless(FALSE);
HWND hWndTop;
HWND hWnd = CWnd::GetSafeOwner_(NULL, &hWndTop);

// set help context if possible
DWORD* pdwContext = NULL;
if (hWnd != NULL)
{
// use app-level context or frame level context
LRESULT lResult = ::SendMessage(hWndTop, WM_HELPPROMPTADDR, 0, 0);
if (lResult != 0)
pdwContext = (DWORD*)lResult;
}
// for backward compatibility use app context if possible
if (pdwContext == NULL && this != NULL)
pdwContext = &m_dwPromptContext;

DWORD dwOldPromptContext = 0;
if (pdwContext != NULL)
{
// save old prompt context for restoration later
dwOldPromptContext = *pdwContext;
if (nIDPrompt != 0)
*pdwContext = HID_BASE_PROMPT+nIDPrompt;
}

// determine icon based on type specified
if ((nType & MB_ICONMASK) == 0)
{
switch (nType & MB_TYPEMASK)
{
case MB_OK:
case MB_OKCANCEL:
nType |= MB_ICONEXCLAMATION;
break;

case MB_YESNO:
case MB_YESNOCANCEL:
nType |= MB_ICONEXCLAMATION;
break;

case MB_ABORTRETRYIGNORE:
case MB_RETRYCANCEL:
// No default icon for these types, since they are rarely used.
// The caller should specify the icon.
break;
}
}

#ifdef _DEBUG
if ((nType & MB_ICONMASK) == 0)
TRACE0("Warning: no icon specified for message box.\n");
#endif

TCHAR szAppName[_MAX_PATH];
LPCTSTR pszAppName;
if (this != NULL)
pszAppName = m_pszAppName;
else
{
pszAppName = szAppName;
GetModuleFileName(NULL, szAppName, _MAX_PATH);
}

int nResult =
::MessageBox(hWnd, lpszPrompt, pszAppName, nType);

// restore prompt context if possible
if (pdwContext != NULL)
*pdwContext = dwOldPromptContext;

// re-enable windows
if (hWndTop != NULL)
::EnableWindow(hWndTop, TRUE);
EnableModeless(TRUE);

return nResult;
}

[bluesmile979]

不应该的，应该还是你自己代码写错了

[yintongshun]

贴一下Code,看看

[fecat]

谢谢大家了,是在一个不经意的角落写了多余的代码,问题解决了.