私のアプリでCFrameWnd::OnHelp
は、古い .hlp ファイルの代わりにワード doc を開くようにオーバーライドしました。しかし、F1 を押すと、関数が 2 回実行されていることに気付きました。スタックを調べたところ、AfxWndProcBase
が command を受信していることがわかりました。その後、を呼び出すときに0x1E146
それCWnd::OnCommand
を切り捨てており、がコマンドです。この直後、command を受信し、再度 help コマンドを実行します。いくつかの実験の後、最初のメッセージが処理されているときに、2 番目のメッセージが呼び出し内で受信および処理されていることがわかりました。0xE146
CFrameWnd::OnCmdMsg
0xE146
ID_HELP
AfxWndProcBase
0xE146
AfxMessageBox
ハンドラーはここにあります:
void CMainFrame::OnHelp() {
BOOL bWorked;
STARTUPINFO suInfo = {};
suInfo.cb = sizeof(suInfo);
PROCESS_INFORMATION procInfo = {};
CString m_Process = _T("Start");
CString vipx = /*_T("\"") +*/ CString(AfxGetApp()->m_pszHelpFilePath) /*+ _T("\"")*/;
bWorked = ::CreateProcess(m_Process,
vipx.GetBuffer(), // requires non-const :(
NULL,
NULL,
FALSE,
NORMAL_PRIORITY_CLASS,
NULL,
NULL,
&suInfo,
&procInfo);
vipx.ReleaseBuffer();
if (procInfo.dwThreadId==NULL || bWorked==false)
AfxMessageBox(_T("Failed to launch help: " + GetErrNoText(GetLastError())));
//AfxMessageBox causes my app to receive the message again?
CloseHandle(procInfo.hProcess);
CloseHandle(procInfo.hThread);
}
0x1E146
F1 を押すと との両方が0xE146
アプリに送信されるのはなぜですか (そして最初のものは何ですか?)
書き直した後、呼び出しShellExecute
も「1深い再帰」を引き起こすことを発見しました。
関連性があるかどうかはわかりませんが、フォームのメッセージ マップは次のとおりです。
BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
ON_WM_CREATE()
//}}AFX_MSG_MAP
// Global help commands
ON_COMMAND(ID_HELP, OnHelp) //F1 <--- both messages are this one?
END_MESSAGE_MAP()
私のリソース ファイルで、F1 用と Shift+F1 用のこれらを見つけました。
VK_F1, ID_CONTEXT_HELP, VIRTKEY, SHIFT, NOINVERT
VK_F1, ID_HELP, VIRTKEY, NOINVERT
おそらく役に立たないかもしれませんが、ここに 2 つのコールスタックがあります。
MyApp.exe!CMainFrame::OnHelp() Line 66 C++
mfc90ud.dll!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x01fea410, unsigned int nID=57670, int nCode=0, void (void)* pfn=0x0040b720, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
mfc90ud.dll!CCmdTarget::OnCmdMsg(unsigned int nID=57670, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 381 + 0x27 bytes C++
mfc90ud.dll!CFrameWnd::OnCmdMsg(unsigned int nID=57670, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 946 + 0x18 bytes C++
mfc90ud.dll!CWnd::OnCommand(unsigned int wParam=123206, long lParam=0) Line 2364 C++
mfc90ud.dll!CFrameWnd::OnCommand(unsigned int wParam=123206, long lParam=0) Line 366 C++
mfc90ud.dll!CWnd::OnWndMsg(unsigned int message=273, unsigned int wParam=123206, long lParam=0, long * pResult=0x0018fba4) Line 1769 + 0x1e bytes C++
mfc90ud.dll!CWnd::WindowProc(unsigned int message=273, unsigned int wParam=123206, long lParam=0) Line 1755 + 0x20 bytes C++
mfc90ud.dll!AfxCallWndProc(CWnd * pWnd=0x01fea410, HWND__ * hWnd=0x001703da, unsigned int nMsg=273, unsigned int wParam=123206, long lParam=0) Line 240 + 0x1c bytes C++
mfc90ud.dll!AfxWndProc(HWND__ * hWnd=0x001703da, unsigned int nMsg=273, unsigned int wParam=123206, long lParam=0) Line 403 C++
mfc90ud.dll!AfxWndProcBase(HWND__ * hWnd=0x001703da, unsigned int nMsg=273, unsigned int wParam=123206, long lParam=0) Line 441 + 0x15 bytes C++
...
mfc90ud.dll!CFrameWnd::PreTranslateMessage(tagMSG * pMsg=0x00712740) Line 249 + 0x1b bytes C++
mfc90ud.dll!CWnd::WalkPreTranslateTree(HWND__ * hWndStop=0x00160bb4, tagMSG * pMsg=0x00712740) Line 2946 + 0x14 bytes C++
mfc90ud.dll!AfxInternalPreTranslateMessage(tagMSG * pMsg=0x00712740) Line 233 + 0x12 bytes C++
mfc90ud.dll!CWinThread::PreTranslateMessage(tagMSG * pMsg=0x00712740) Line 777 + 0x9 bytes C++
MyApp.exe!CCXMyAppApp::PreTranslateMessage(tagMSG * pMsg=0x00712740) Line 749 C++
mfc90ud.dll!AfxPreTranslateMessage(tagMSG * pMsg=0x00712740) Line 252 + 0x11 bytes C++
mfc90ud.dll!AfxInternalPumpMessage() Line 178 + 0x18 bytes C++
2 番目のメッセージ:
MyApp.exe!CMainFrame::OnHelp() Line 66 C++
mfc90ud.dll!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x01fea410, unsigned int nID=57670, int nCode=0, void (void)* pfn=0x0040b720, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
mfc90ud.dll!CCmdTarget::OnCmdMsg(unsigned int nID=57670, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 381 + 0x27 bytes C++
mfc90ud.dll!CFrameWnd::OnCmdMsg(unsigned int nID=57670, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 946 + 0x18 bytes C++
mfc90ud.dll!CWnd::OnCommand(unsigned int wParam=57670, long lParam=0) Line 2364 C++
mfc90ud.dll!CFrameWnd::OnCommand(unsigned int wParam=57670, long lParam=0) Line 366 C++
mfc90ud.dll!CWnd::OnWndMsg(unsigned int message=273, unsigned int wParam=57670, long lParam=0, long * pResult=0x0018e264) Line 1769 + 0x1e bytes C++
mfc90ud.dll!CWnd::WindowProc(unsigned int message=273, unsigned int wParam=57670, long lParam=0) Line 1755 + 0x20 bytes C++
mfc90ud.dll!AfxCallWndProc(CWnd * pWnd=0x01fea410, HWND__ * hWnd=0x001703da, unsigned int nMsg=273, unsigned int wParam=57670, long lParam=0) Line 240 + 0x1c bytes C++
mfc90ud.dll!AfxWndProc(HWND__ * hWnd=0x001703da, unsigned int nMsg=273, unsigned int wParam=57670, long lParam=0) Line 403 C++
mfc90ud.dll!AfxWndProcBase(HWND__ * hWnd=0x001703da, unsigned int nMsg=273, unsigned int wParam=57670, long lParam=0) Line 441 + 0x15 bytes C++
...
mfc90ud.dll!CWnd::SendMessageW(unsigned int message=273, unsigned int wParam=57670, long lParam=0) Line 42 + 0x44 bytes C++
mfc90ud.dll!CWnd::OnHelpInfo(tagHELPINFO * __formal=0x0008c890) Line 3195 C++
mfc90ud.dll!CWnd::OnWndMsg(unsigned int message=83, unsigned int wParam=0, long lParam=575632, long * pResult=0x0018e5ec) Line 1948 + 0xd bytes C++
mfc90ud.dll!CWnd::WindowProc(unsigned int message=83, unsigned int wParam=0, long lParam=575632) Line 1755 + 0x20 bytes C++
mfc90ud.dll!AfxCallWndProc(CWnd * pWnd=0x0253a410, HWND__ * hWnd=0x00160bb4, unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 240 + 0x1c bytes C++
mfc90ud.dll!AfxWndProc(HWND__ * hWnd=0x00160bb4, unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 403 C++
mfc90ud.dll!AfxWndProcBase(HWND__ * hWnd=0x00160bb4, unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 441 + 0x15 bytes C++
...
mfc90ud.dll!CWnd::DefWindowProcW(unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 1043 + 0x20 bytes C++
mfc90ud.dll!CWnd::Default() Line 274 C++
mfc90ud.dll!CWnd::OnHelpInfo(tagHELPINFO * __formal=0x0008c890) Line 3198 + 0x8 bytes C++
mfc90ud.dll!CWnd::OnWndMsg(unsigned int message=83, unsigned int wParam=0, long lParam=575632, long * pResult=0x0018eb70) Line 1948 + 0xd bytes C++
mfc90ud.dll!CWnd::WindowProc(unsigned int message=83, unsigned int wParam=0, long lParam=575632) Line 1755 + 0x20 bytes C++
mfc90ud.dll!AfxCallWndProc(CWnd * pWnd=0x0253aa28, HWND__ * hWnd=0x000b08c6, unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 240 + 0x1c bytes C++
mfc90ud.dll!AfxWndProc(HWND__ * hWnd=0x000b08c6, unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 403 C++
mfc90ud.dll!AfxWndProcBase(HWND__ * hWnd=0x000b08c6, unsigned int nMsg=83, unsigned int wParam=0, long lParam=575632) Line 441 + 0x15 bytes C++
...
mfc90ud.dll!CWnd::DefWindowProcW(unsigned int nMsg=77, unsigned int wParam=0, long lParam=0) Line 1043 + 0x20 bytes C++
mfc90ud.dll!CWnd::WindowProc(unsigned int message=77, unsigned int wParam=0, long lParam=0) Line 1756 + 0x1c bytes C++
mfc90ud.dll!AfxCallWndProc(CWnd * pWnd=0x0253aa28, HWND__ * hWnd=0x000b08c6, unsigned int nMsg=77, unsigned int wParam=0, long lParam=0) Line 240 + 0x1c bytes C++
mfc90ud.dll!AfxWndProc(HWND__ * hWnd=0x000b08c6, unsigned int nMsg=77, unsigned int wParam=0, long lParam=0) Line 403 C++
mfc90ud.dll!AfxWndProcBase(HWND__ * hWnd=0x000b08c6, unsigned int nMsg=77, unsigned int wParam=0, long lParam=0) Line 441 + 0x15 bytes C++
...
mfc90ud.dll!CWnd::WindowProc(unsigned int message=7423648, unsigned int wParam=7423712, long lParam=2016221872) Line 1755 + 0x20 bytes C++
...
mfc90ud.dll!AfxDeactivateActCtx(unsigned long dwFlags=0, unsigned long ulCookie=353633777) Line 260 + 0x17 bytes C++
mfc90ud.dll!AFX_MAINTAIN_STATE2::~AFX_MAINTAIN_STATE2() Line 63 + 0xe bytes C++