二、控件或窗口操作

①EnableWindow函数

②FindWindow函数

③SetWindowText函数

④GetWindowText函数

⑤GetWindowRect函数

⑥GetClientRect函数

⑦GetActiveWindow函数

代码实例

#include<windows.h>
#include<CommCtrl.h>  
//使用Unicode版本必须加入manifest强制让应用程序加载common Control 6.0
//#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")  
//#pragma comment(lib,"Comctl32.lib")


//自定义的窗口过程
LRESULT  CALLBACK    MyWindowProc(HWND hWnd, UINT Msg,
    WPARAM wParam, LPARAM lParam)
{
    switch (Msg)
    {
    case WM_DESTROY:
        PostQuitMessage(0);//可以使GetMessage返回0    
        return 0;
         
    case  WM_LBUTTONDOWN:
        {
            //获取当前活动的窗口
            HWND  hActive = GetActiveWindow();
            TCHAR buf[64] = { 0 };
            GetWindowText(hActive, buf, 64);
            MessageBox(NULL, buf, L"提示", MB_OK);

        }break;


    case WM_CREATE:
    {

        HWND hEdit1 = CreateWindow(WC_EDIT,
            L"编辑控件",
            WS_CHILD | WS_VISIBLE ,
            30, 30,
            100, 30,
            hWnd,
            (HMENU)111,
            ((LPCREATESTRUCT)lParam)->hInstance,
            NULL);

        HWND hEdit2 = CreateWindow(WC_EDIT,
            L"123",
            WS_CHILD | WS_VISIBLE | WS_BORDER,
            30, 100,
            200, 30,
            hWnd,
            (HMENU)222,
            ((LPCREATESTRUCT)lParam)->hInstance,
            NULL);

        //根据窗口句柄禁用或启用窗口
        EnableWindow(hEdit1,false);
        EnableWindow(hEdit1, true);
        //EnableWindow(hWnd, false);//禁用父窗口


        //根据窗口类名、窗口标题查找顶层窗口(父窗口)
        HWND   h1 = FindWindow(L"MrHuang", NULL);
        bool  b1 = (h1 == hWnd);
        HWND   h2 = FindWindow(NULL, L"第一个窗口程序");
        bool  b2 = (h2 == hWnd);
        HWND   h3 = FindWindow(L"Mr", L"第一个窗口程序");
        bool  b3 = (h3 == hWnd);
        HWND   h4 = FindWindow(WC_EDIT,  NULL);//不能用于子窗口与控件
        bool  b4 = (h4 == hEdit2);
     
        HWND   hTxt= FindWindow(NULL, L"新建文本文档.txt - 记事本");//查找记事本
        SendMessage(hTxt, WM_SETTEXT, 0,(LPARAM)L"篡改你的标题");

        //根据窗口句柄设置窗口标题
        //SetWindowText(hWnd, L"改掉标题");
        //SetWindowText(hEdit1, L"改掉标题");

        //根据窗口句柄获取窗口标题
        TCHAR buf[64] = {0};
        GetWindowText(hEdit2, buf, 64);
        OutputDebugString(buf);

        //获取窗口的矩形区域
        RECT  r;
        GetWindowRect(hWnd, &r);
         
        //获取窗口的客户区域
        RECT  r2;
        GetClientRect(hWnd, &r2);

      //设置控件具有焦点
        SetFocus(hEdit1);

        //根据窗口句柄移动窗口
        //MoveWindow(hWnd, 0, 0, 600, 600, true);//移动父窗口
        //MoveWindow(hEdit2, 300, 300, 100, 100, true);//移动控件

        //获取当前活动的窗口
        HWND  hActive = GetActiveWindow();
        bool  b8 = (hActive == hWnd);
         

    }break;
    }

    return DefWindowProc(hWnd, Msg, wParam, lParam);
}


int  WINAPI   WinMain(HINSTANCE  hInstance, HINSTANCE  hPrevInstance,
    LPSTR lpCmdLine, int  nShowCmd)
{

    //1.注册窗口类
    WNDCLASS  wnd;
    wnd.cbClsExtra = 0;
    wnd.cbWndExtra = 0;
    wnd.hbrBackground = (HBRUSH)(GetStockObject(GRAY_BRUSH));//背景色
    wnd.hCursor = LoadCursor(NULL, IDC_ARROW);//光标
    wnd.hIcon = LoadIcon(NULL, IDI_APPLICATION);//图标
                                                //wnd.lpfnWndProc = DefWindowProc;//默认窗口过程函数，用于处理消息
    wnd.lpfnWndProc = MyWindowProc;//自定义的窗口过程函数
    wnd.lpszClassName = L"MrHuang";//窗口类名
    wnd.lpszMenuName = NULL;//菜单资源名称
    wnd.style = CS_HREDRAW | CS_DBLCLKS;//窗口类、样式
    wnd.hInstance = hInstance;//实例句柄
    RegisterClass(&wnd);

    //创建窗口(返回之前发送WM_CREATE)
    HWND    hWnd = CreateWindow(L"MrHuang", L"第一个窗口程序",
        WS_OVERLAPPEDWINDOW, 100, 100, 400, 400, NULL, NULL, hInstance, NULL);

    //显示窗口
    ShowWindow(hWnd, nShowCmd);
    //更新窗口(发送WM_PAINT)
    UpdateWindow(hWnd);


    //创建窗口(返回之前发送WM_CREATE)
    HWND    hWnd2 = CreateWindow(L"MrHuang", L"第二个窗口程序",
        WS_OVERLAPPEDWINDOW, 500, 100, 400, 400, NULL, NULL, hInstance, NULL);

    //显示窗口
    ShowWindow(hWnd2, nShowCmd);
    //更新窗口(发送WM_PAINT)
    UpdateWindow(hWnd2);



    //消息循环（收到WM_QUIT消息退出）
    MSG  msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);//翻译消息
        DispatchMessage(&msg);//分发消息到窗口过程
    }
}