MFC全鍵盤鈎

Question

當應用程序不在焦點時，應用程序如何檢測Kay按下？ [已解決] 我需要在插入鍵按下啟動計時器，並在應用程序窗口未聚焦時再次按下停止。 任何人都可以向我展示源代碼或基於MFC的示例嗎？ 我知道MFC沒有那種類型的成員，但是如何在MFC中實現正確的源代碼？ 如何通過按鍵啟動計時器？

  // MainHamsterDlg.cpp : implementation file

        #include "stdafx.h"
        #include "MainHamsterDlg.h"

        // MainHamsterDlg dialog
        IMPLEMENT_DYNAMIC(MainHamsterDlg, CDialogEx)

        MainHamsterDlg::MainHamsterDlg(CWnd* pParent)
            : CDialogEx(MainHamsterDlg::IDD, pParent)
        {

        }

        void MainHamsterDlg::DoDataExchange(CDataExchange* pDX)
        {
            CDialogEx::DoDataExchange(pDX);
        }


        BEGIN_MESSAGE_MAP(MainHamsterDlg, CDialogEx)
            ON_WM_TIMER()
        END_MESSAGE_MAP()


        HHOOK _hook;
        KBDLLHOOKSTRUCT kbdStruct;

        LRESULT __stdcall HookCallback(int nCode, WPARAM wParam, LPARAM lParam)
        {
            if (nCode >= 0)
            {
                // the action is valid: HC_ACTION.
                if (wParam == WM_KEYUP)
                {
                    kbdStruct = *((KBDLLHOOKSTRUCT*)lParam);
                    // a key (non-system) is pressed.
                    if (kbdStruct.vkCode == VK_INSERT)
                    {
                       SetTimer(NULL, 0, 0, NULL); <<<----- this don't starts timer 
                    }
                }
            }
           return CallNextHookEx(_hook, nCode, wParam, lParam);
        }

        void SetHook()
        {
            if (!(_hook = SetWindowsHookEx(WH_KEYBOARD_LL, HookCallback, NULL, 0)))
            {
                MessageBox(NULL, "Failed to install hook!", "Error", MB_ICONERROR);
            }
        }

        void ReleaseHook()
        {
            UnhookWindowsHookEx(_hook);
        }

        BOOL MainHamsterDlg::OnInitDialog()
        { SetHook();

            //SetTimer(0, 0, NULL); <<<------- this starts timer 
            CDialogEx::OnInitDialog();

            return TRUE;
        }

        void MainHamsterDlg::OnTimer(UINT nIDEvent)
        {
        //do something
              CDialog::OnTimer(nIDEvent);
        }

Answer 1

你可以使用SetWindowsHookEx

這允許您為任何回調創建全局掛鈎。