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c++ - 如何在 winapi C++ 上创建一些基本控件,如列表框

转载 作者:行者123 更新时间:2023-11-28 01:46:24 25 4
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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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