Visual Studio MFC dialog application , Press ESC to exit app

Question

I created a dialog application in Visual Studio MFC.

I run the exe file and press "ESC" , the app will be closed.

Any way to don't close app when user press "ESC"?

Answer 1

Hi,

Thank you for posting here.

>>Any way to don't close app when user press "ESC"?

I suggest you could try to override the PreTranslateMessage notification and block all VK_ESCAPE messages of WM_KEYDOWN.

Here is my code:

BOOL CMFCApplication85Dlg::PreTranslateMessage(MSG* pMsg)
{
    if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_ESCAPE)     return   TRUE;
   
    else

    return CDialogEx::PreTranslateMessage(pMsg);
}

Best Regards,

Jeanine Zhang

---

"Visual c++" forum will be migrating to a new home on Microsoft Q&A !
We invite you to post new questions in the "Developing Universal Windows apps" forum’s new home on Microsoft Q&A !
For more information, please refer to the sticky post.

Answer 2

If all messages are blocked then any control in the dialog that actually uses the ESC key will lose functionality.  For example, pressing ESC to close a combobox dropdown list will no longer function.

Add a test to the PreTranslateMessage override to only handle messages for the dialog box window -

if (pMsg->hwnd == m_hWnd && pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_ESCAPE)