2020年10月

Window中VB有InputBox的功能，但SDK、MFC、WTL等并未提供类似功能。

WTL有CIndirectDialogImpl，可以很简单的构建对话框。基于此，实现一个简单的InputBox功能

#define BUF_LEN MAX_PATH

#define IDC_TEXT    (100)

class CInputBox: public CIndirectDialogImpl< CInputBox >{private:

    LPCTSTR szPrompt_;

    LPCTSTR szTitle_;

    LPCTSTR szDefaultText_;

    TCHAR   strResult[BUF_LEN];public:

    BEGIN_DIALOG(0, 0, 257, 62)

        DIALOG_CAPTION(szTitle_!= nullptr ? szTitle_ : _T(""))

        DIALOG_STYLE(DS_MODALFRAME| WS_POPUP | WS_CAPTION |WS_SYSMENU)

        DIALOG_FONT(9, _T("SimSun"))

    END_DIALOG()



    BEGIN_CONTROLS_MAP()

        CONTROL_DEFPUSHBUTTON(_T("OK"), IDOK, 200, 11, 50, 14, 0, 0)

        CONTROL_PUSHBUTTON(_T("Cancel"), IDCANCEL, 200, 31, 50, 14, 0, 0)

        CONTROL_LTEXT(szPrompt_!= nullptr ? szPrompt_ : _T("Please input:"), IDC_STATIC, 7, 7, 158, 14, 0, 0)

        CONTROL_EDITTEXT(IDC_TEXT,7, 31, 180, 14, 0, 0)

    END_CONTROLS_MAP()



    BEGIN_MSG_MAP(CInputBox)

        MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)

        COMMAND_ID_HANDLER(IDOK, OnCloseCmd)

        COMMAND_ID_HANDLER(IDCANCEL, OnCloseCmd)

    END_MSG_MAP()



    CInputBox::CInputBox() : szPrompt_(nullptr), szTitle_(nullptr), szDefaultText_(nullptr){

        memset(strResult,0, sizeof(TCHAR)*BUF_LEN);

    }static bool InputBox(LPCTSTR szPrompt, LPTSTR strResult, LPCTSTR szTitle = _T(""), LPCTSTR szDefaultText = _T(""), HWND hParent =nullptr){

        CInputBox dlg;

        dlg.szPrompt_=szPrompt;

        dlg.szTitle_=szTitle;

        dlg.szDefaultText_=szDefaultText;if (IDOK ==dlg.DoModal(hParent)) {//get return string.
lstrcpyn(strResult, dlg.strResult, BUF_LEN);return true;

        }return false;

    }



    LRESULT OnInitDialog(UINT/*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)

    {

        CenterWindow(GetParent());if(szDefaultText_) {

            ::SetWindowText(::GetDlgItem(m_hWnd, IDC_TEXT), szDefaultText_);

        }//set focus to edit control item.
::SetFocus(::GetDlgItem(m_hWnd, IDC_TEXT));//return false to prevent setfocus in dialogproc.
        return false;

    }



    LRESULT OnCloseCmd(WORD/*wNotifyCode*/, WORD wID, HWND /*hWndCtl*/, BOOL& /*bHandled*/)

    {if (wID ==IDOK) {

            ::GetWindowText(::GetDlgItem(m_hWnd, IDC_TEXT), strResult, BUF_LEN- 1);

        }



        EndDialog(wID);return 0;

    }

};

使用类似于如下：

voiddemo()

{

    TCHAR strPassWd[MAX_PATH];if (CInputBox::InputBox(_T("请输入加密密码："), strPassWd, _T("输入密码"))) {//}return;

}