visual-studio MFC中标题栏上的关闭按钮
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Close Button on Title Bar in MFC
提问by Aamir
In Vc++ 6.0 Dialog Based MFC application: I do not want my user close the window by pressing the button [X] in the top-right side of the window itself and also (Alt+F4). I want to display a messageBox ("Do you really want to close the application"); if the user clicks the OK button then the application has to close, else if user clicks the CANCEL button then the application must not be closed.
在 Vc++ 6.0 基于对话框的 MFC 应用程序中：我不希望我的用户通过按下窗口本身右上角的按钮 [X] 以及 (Alt+F4) 来关闭窗口。我想显示一个消息框（“你真的要关闭应用程序吗”）；如果用户单击 OK 按钮，则应用程序必须关闭，否则，如果用户单击 CANCEL 按钮，则应用程序不得关闭。
回答by RichieHindle
回答by Aamir
Handle the WM_SYSCOMMANDmessage and do something like this in it.
处理WM_SYSCOMMAND消息并在其中执行类似的操作。
void CMyApp::OnSysCommand(UINT nID, LPARAM lParam)
{
if(nID == SC_CLOSE)
{
if(MessageBox(_T("Really"), _T("What"), MB_YESNO) == IDYES);
//Do What you want here.
else
//Do something else
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}
Here is how to add WM_SYSCOMMAND Handler to your Code:
以下是如何将 WM_SYSCOMMAND 处理程序添加到您的代码中：
Go to ClassView. Right click your dialog class if it is a dialog based application OR your mainframe class if it is a SDI/MDI Application. Click Properties.
转到类视图。如果您的对话框类是基于对话框的应用程序，请右键单击您的对话框类，如果它是 SDI/MDI 应用程序，则右键单击您的大型机类。单击属性。
In Properties Window, click on the Messages button. Scroll down to WM_SYSCOMMAND and on drop-down combo double-click to add the handler.
在属性窗口中，单击消息按钮。向下滚动到 WM_SYSCOMMAND 并在下拉组合中双击以添加处理程序。
OR
或者
You can do it manually as well by adding an entry in the message map. And adding declaration/definition in .h/.cpp respectively.
您也可以通过在消息映射中添加条目来手动执行此操作。并分别在 .h/.cpp 中添加声明/定义。
