6

我已经浏览了多个站点、文档和教程,它们都说相同,也就是说,任何控件都只不过是 Win32 API 中的一个窗口,因此可以使用该CreateWindowExW()函数在主控件上创建一个ListBox控件/窗口应用程序窗口。

尽管我知道所有控件都是具有不同dwStyle的窗口的概念,但我很难找出如何实例化,也就是说,ListBox控件。

我遇到了一个教程,其中编写了一个对话框以LISTBOX在其声明中指定如下:

// resource.h
#define IDD_MAIN                        101
#define IDC_TEXT                        1000
#define IDC_NUMBER                      1001
#define IDC_LIST                        1002
#define IDC_ADD                         1003
#define IDC_CLEAR                       1004
#define IDC_REMOVE                      1005
#define IDC_SHOWCOUNT                   1006

// .rc resource file
IDD_MAIN DIALOG DISCARDABLE  0, 0, 207, 156
    STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
    CAPTION "Controls One"
    FONT 8, "MS Sans Serif"
BEGIN
    LTEXT           "Add",IDC_STATIC,7,10,14,8
    EDITTEXT        IDC_TEXT,25,7,120,14,ES_AUTOHSCROLL
    EDITTEXT        IDC_NUMBER,150,7,21,14,ES_NUMBER
    LTEXT           "times.",IDC_STATIC,177,10,23,8
    LISTBOX         IDC_LIST,7,25,138,106,LBS_NOINTEGRALHEIGHT | 
                    LBS_EXTENDEDSEL | WS_VSCROLL | WS_TABSTOP
    PUSHBUTTON      "&Add",IDC_ADD,150,30,50,14
    PUSHBUTTON      "&Remove",IDC_REMOVE,150,47,50,14
    PUSHBUTTON      "&Clear",IDC_CLEAR,150,63,50,14
    LTEXT           "This item was added",IDC_STATIC,7,141,66,8
    CTEXT           "-",IDC_SHOWCOUNT,77,141,32,8
    LTEXT           "times",IDC_STATIC,114,141,17,8
END

并在他的 C 程序中使用它,如下所示:

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    return DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, DlgProc);
}

现在,我能够做到并完全理解这些概念。另外,我希望能够创建和设计我的主应用程序窗口以添加ListBox控件。本教程示例不使用该CreateWindowExW()函数来创建控件,而是创建一个对话框,该对话框实际上将是主应用程序窗口。

1 -关于如何ListBox在代码中向主窗口添加控件的任何线索?

我考虑在处理WM_CREATE消息时创建它。

2 -这是个好主意吗?

3 -在这种情况下,最佳实践/方法是什么?

4

2 回答 2

11

为了在 Win32 中动态创建控件,您需要以下代码:

HWND hBtn, hLabel, hListbox, hTextBox;

void InitializeComponent(HWND hWnd) {
    HINSTANCE hInstance = GetModuleHandle(NULL);

    // Adding a Button.
    hBtn = CreateWindowExW(WS_EX_APPWINDOW,
        L"BUTTON", NULL,
        WS_CHILD | WS_VISIBLE,
        327, 7, 70, 21,
        hWnd, NULL, hInstance, NULL);        

    SetWindowTextW(hBtn, L"&Button");

    // Adding a Label.
    hLabel = CreateWindowExW(WS_EX_CLIENTEDGE,
        L"STATIC", NULL,
        WS_CHILD | WS_VISIBLE,
        7, 7, 50, 21,
        hWnd, NULL, hInstance, NULL);

    SetWindowTextW(hLabel, L"Label:");

    // Adding a ListBox.
    hListBox = CreateWindowExW(WS_EX_CLIENTEDGE,
        L"LISTBOX", NULL,
        WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_AUTOVSCROLL,
        7, 35, 300, 200,
        hWnd, NULL, hInstance, NULL);

    // Adding a TextBox.
    hTextBox = CreateWindowExW(WS_EX_CLIENTEDGE,
        L"EDIT", NULL,
        WS_CHILD | WS_VISIBLE | ES_AUTOVSCROLL,
        62, 7, 245, 21,
        hWnd, NULL, hInstance, NULL);

    SetWindowTextW(hTextBox, L"Input text here...");
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam) {
    switch (Msg) {
        case WM_CREATE:
            InitializeComponent(hWnd);
            break;            
        default:
            return DefWindowProcW(hWnd, Msg, wParam, lParam);
    }
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {
    // Declaring, defining, registering and creating window here...
    // Note that each Window/Control has to have its own Message handling function.
}
于 2010-12-17T20:52:20.150 回答
2
HWND hListBox; // Handle for list box control

hListBox = CreateWindowEx(
  WS_EX_CLIENTEDGE, // extended window styles
  "LISTBOX", // list box window class name
  NULL,
  WS_CHILD | WS_VISIBLE, // window styles
  7,   // horizontal position
  35,  // vertical position
  300, // width
  200, // height
  hWnd,
  NULL,
  hInstance,
  NULL
);

if (!hListBox){
  // failed to create list box window - take actions ...
}
于 2014-08-25T19:42:03.217 回答