自定义按钮需要先构造资源文件，如下：
RESOURCE CBA r_my_softkey
    {
    buttons =
        {
        CBA_BUTTON
            {
            id = EAknSoftkeyMaybe;
            txt = "Maybe"; // Texts can be defined in .loc file(s)
                           // to support language localization
            },
        CBA_BUTTON
            {
            id = EAknSoftkeyWhy;
            txt = "Why?";
            }
        };
    }
[code]
然后取代询问对话框的默认按纽：
[code]
RESOURCE DIALOG r_myconfirmation_query
    {
    flags = EGeneralQueryFlags;
    buttons = r_my_softkey; // note that own softkey is
                            // used as lowercase
    items =
        {
        DLG_LINE
            {
            type = EAknCtQuery;
            id = EGeneralQuery;
            control = AVKON_CONFIRMATION_QUERY;
            },
        ...
        }

询问对话框的处理和其他对话框一样，可以通过OkToExit()来处理按键：
Code:

// class CMyAknQueryDialog: public CAknQueryDialog, ...
#include <eikenv.h>
TBool CMyAknQueryDialog::OkToExitL(TInt aButtonId)
    {
    if (aButtonId == EAknSoftkeyMaybe)
        // Handle “Maybe” key press
    else if (aButtonId == EAknSoftkeyWhy)
        // Handle “Why” key press
    return ETrue;
    }

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