c++ - 如何在 winapi C++ 上创建一些基本控件,如列表框

标签 c++ winapi combobox listbox codeblocks

我在我的 Windows 8.1 机器上使用 codeblocks ide 在 cpp 中做一个小项目。添加菜单很好,甚至我还添加了一些常用控件,如按钮、静态、根据我从在线资源中获得的一些笔记进行编辑。

main.cpp

#include <stdio.h>
#include <string.h>
#include <windows.h>
#include <winuser.h>

#define BTN_BUTTON 201
#define CMB_COMBOBOX 202
#define LST_LISTBOX 203
#define TXT_TEXTBOX 204
/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[ ] = "CodeBlocksWindowsApp";

int WINAPI WinMain (HINSTANCE hThisInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR lpszArgument,
                     int nCmdShow)
{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default colour as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Code::Blocks Template Windows App",       /* Title Text */
           WS_OVERLAPPEDWINDOW, /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           544,                 /* The programs width */
           375,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow (hwnd, nCmdShow);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
        case WM_CREATE:
            CreateWindow ("combobox", NULL,
                WS_CHILD | WS_VISIBLE | CBS_DROPDOWNLIST,
                20, 10, 400, 120,
                hwnd, (HMENU)CMB_COMBOBOX, GetModuleHandle(NULL), NULL);
  // If you uncomment the function below that I used to create a listbox see my program does not compile          
/*
                CreateWindow ("listbox", NULL,
                    WS_CHILD | WS_VISIBLE | LBS_NOTIFY | LBS_COMBOBOX,
                    20, 40, 140, 120,
                    hwnd, (HMENU)LST_LISTBOX, GetModuleHandle(NULL), NULL);
                */
            CreateWindow("edit", NULL,
                WS_VISIBLE | WS_CHILD | WS_BORDER | WS_VSCROLL| ES_MULTILINE | ES_AUTOHSCROLL,
                170, 40, 250, 120,
                hwnd, (HMENU)TXT_TEXTBOX, GetModuleHandle(NULL), NULL);

            CreateWindow("button", "Submit This",
                WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON,
                300, 170, 120, 30,
                hwnd, (HMENU)BTN_BUTTON, GetModuleHandle(NULL), NULL);

            break;
        case WM_DESTROY:
            PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
            break;
        default:                      /* for messages that we don't deal with */
            return DefWindowProc (hwnd, message, wParam, lParam);
    }

    return 0;
}

现在,如果我省略列表框的代码,我的代码中的所有内容都可以完美运行,我非常希望它成为我代码的一部分。在创建ListBox的函数中编译注释

error: "LBS_COMBOBOX" was not declared in this scope

但是 LBS_NOTIFY 没问题。如果有人在阻止我的 cpp 程序运行的问题上启发我,我将不胜感激。在这方面我还是个新手,我可能忽略了一些事情。

这是修改后的版本

最佳答案

无论如何你都不应该使用 LBS_COMBOBOX,它是 Windows 使用的内部样式:

The combo box itself must set this style. If the style is set by anything but the combo box, the list box will regard itself incorrectly as a child of a combo box and a failure will result.

也许您的 SDK 不包含此样式的定义,因为您永远不应该设置它。

关于c++ - 如何在 winapi C++ 上创建一些基本控件,如列表框,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44877895/

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