使用WNDCLASSEX创建窗口? [Cpp] [英] Create window with WNDCLASSEX? [Cpp]
问题描述
这里是我的代码...实际上它是从Microsoft教程几乎复制和粘贴,我试图学习...
First here is my code... well actually it is pretty much copied and pasted from Microsoft tutorial that I am trying to learn from...
CreateWindow.h
#ifndef CreateWindow_H
#define CreateWindow_H
#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>
using namespace std;
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow);
#endif
CreateWindow.cpp / p>
CreateWindow.cpp
#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>
// Global variables
// The main window class name.
static TCHAR szWindowClass[] = _T("win32app");
// The string that appears in the application's title bar.
static TCHAR szTitle[] = _T("Win32 Guided Tour Application");
HINSTANCE hInst;
// Forward declarations of functions included in this code module:
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow) {
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, static_cast<WORD>(MAKEINTRESOURCE(IDI_APPLICATION)));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
if (!RegisterClassEx(&wcex)) {
MessageBox(NULL,
_T("Call to RegisterClassEx failed!"),
_T("Win32 Guided Tour"),
NULL);
return 1;
}
hInst = hInstance; // Store instance handle in our global variable
// The parameters to CreateWindow explained:
// szWindowClass: the name of the application
// szTitle: the text that appears in the title bar
// WS_OVERLAPPEDWINDOW: the type of window to create
// CW_USEDEFAULT, CW_USEDEFAULT: initial position (x, y)
// 500, 100: initial size (width, length)
// NULL: the parent of this window
// NULL: this application dows not have a menu bar
// hInstance: the first parameter from WinMain
// NULL: not used in this application
HWND hWnd = CreateWindow(
szWindowClass,
szTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
500, 100,
NULL,
NULL,
hInstance,
NULL
);
if (!hWnd) {
MessageBox(NULL,
_T("Call to CreateWindow failed!"),
_T("Win32 Guided Tour"),
NULL);
return 1;
}
// The parameters to ShowWindow explained:
// hWnd: the value returned from CreateWindow
// nCmdShow: the fourth parameter from WinMain
ShowWindow(hWnd,
nCmdShow);
UpdateWindow(hWnd);
// Main message loop:
MSG msg;
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int) msg.wParam;
}
错误:
C:\Users\***\Documents\CodeBlocksProjects\encryptText\CreateWindow.cpp||In function 'int WinMain(HINSTANCE__*, HINSTANCE__*, CHAR*, int)':|
C:\Users\***\Documents\CodeBlocksProjects\encryptText\CreateWindow.cpp|32|error: cast from 'CHAR*' to 'WORD' loses precision|
C:\Users\***\Documents\CodeBlocksProjects\encryptText\CreateWindow.cpp|32|error: invalid static_cast from type 'CHAR*' to type 'WORD'|
C:\Users\***\Documents\CodeBlocksProjects\encryptText\CreateWindow.cpp|37|error: cast from 'CHAR*' to 'WORD' loses precision|
||=== Build finished: 3 errors, 0 warnings ===|
我想我需要做一个static_cast,但没有什么工作。我甚至尝试使用WORD,但仍然去错误。所以我不知道该做什么。
I thought that I would need to do a static_cast, but nothing was working. I even tried using WORD, but still go the error. So I have no idea what to do there.
此外,我如何使用这个?我读了整个教程几次。
Also how do I even use this? I read the entire tutorial a couple times.
教程: http://msdn.microsoft.com/en-us/library/bb384843.aspx
我以为你会例如
// start up the four variables before hand, how ever that is done
WinMain(hInstance, hPrevInstance, lpCmdLine, nCmdShow);
我真的没有到那儿。
不要误解我,但我明白了很多,但是我不明白的事情会在下面列出。
Don't get me wrong though... I understand a lot of it, but the things I don't understand ill go ahead and list below.
- _T / TCHAR
- CALLBACK
- 如何启动实际应用程序
- 解决投放时遇到的编译器错误
- _T / TCHAR
- CALLBACK
- How to start up application for actual use
- Fix compiler errors for casting
推荐答案
处理_T,TCHAR和tchar.h。那些是从可以想象你可能必须让你的代码在Windows 95/98和NT上同时运行的日子的遗迹。我假设这不是你的问题。只要使一切UNICODE - 你不会后悔。这意味着所有字符串文字都需要加上一个'L'前缀。例如
You'll find it extremely helpful to not deal with _T, TCHAR, and tchar.h. Those are relics from the days when it was conceivable you might have to have your code run on Windows 95/98 and NT at the same time. I'm assuming this isn't an issue for you. Just make everything UNICODE - you won't regret it. This does mean that all string literals will need to get prefixed with an 'L'. E.g.
L"Win32 Guided Tour"
现在这样做:
将以下两行添加到源文件的最上面(在所有include之前) p>
Add the following two lines to the very top of your source file (before all the includes)
#ifndef UNICODE
#define UNICODE
#endif
#ifndef _UNICODE
#define _UNICODE
#endif
(或者更好的方法是确保UNICODE和_UNICODE在你的项目设置中设置,这是Visual Studio中的默认值 - 所以如果你运行的是VS2008或VS2010,那么就跳过所有这一切)。
(Or better yet, just make sure UNICODE and _UNICODE are set in your project settings. This is the default in Visual Studio - so if you're running VS2008 or VS2010, then just skip all this).
,请取出您的LoadIcon调用中的static_cast。你的代码将编译(希望运行)很好。
Now, take out the static_cast in your LoadIcon calls. Your code will compile (and hopefully run) just fine.
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