必须进行哪些更改才能使此 Windows 文本框从 2011 年开始在 2019 年正常工作？

Question

必须进行哪些更改才能使此 Windows 文本框从 2011 年开始在 2019 年正常工作？

我尝试编译 this question from 2011 中关于制作 C++ 文本框的代码...

#include <windows.h>

#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='x86' publicKeyToken='6595b64144ccf1df' language='*'\"")

LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR nCmdLine, int nCmdShow)
{
    LPTSTR windowClass = TEXT("WinApp");
    LPTSTR windowTitle = TEXT("Windows Application");
    WNDCLASSEX wcex;

    wcex.cbClsExtra = 0;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.cbWndExtra = 0;
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wcex.hInstance = hInstance;
    wcex.lpfnWndProc = WndProc;
    wcex.lpszClassName = windowClass;
    wcex.lpszMenuName = NULL;
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    if (!RegisterClassEx(&wcex))
    {
        MessageBox(NULL, TEXT("RegisterClassEx Failed!"), TEXT("Error"), MB_ICONERROR);
        return EXIT_FAILURE;
    }

    HWND hWnd;

    if (!(hWnd = CreateWindow(windowClass, windowTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL)))
    {
        MessageBox(NULL, TEXT("CreateWindow Failed!"), TEXT("Error"), MB_ICONERROR);
        return EXIT_FAILURE;
    }

    HWND hWndEdit = CreateWindow(TEXT("Edit"), TEXT("test"), WS_CHILD | WS_VISIBLE | WS_BORDER, 100, 20, 140, 20, hWnd, NULL, NULL, NULL);

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    MSG msg;

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return EXIT_SUCCESS;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_DESTROY:
        PostQuitMessage(EXIT_SUCCESS);
    default:
        return DefWindowProc(hWnd, msg, wParam, lParam);
    }
    return FALSE;
}

但尝试在 Visual Studio 2019 中构建它时，我收到有关无法将“t_char”转换为“LPTSTR”的错误。

那么，如何更新代码才能正常工作？是否可以不包含任何其他文件？

Answer 1

使用LPCTSTR 代替LPTSTR：

LPCTSTR windowClass = TEXT("WinApp");
LPCTSTR windowTitle = TEXT("Windows Application");

LPTSTR 是TCHAR *

LPCTSTR 是const TCHAR *

TEXT("literal") 产生一个const TCHAR []。

字符串文字是常量数据。从 C++11 开始，您不能再将字符串文字分配给指向非 const 的指针。

Answer 2

完全退出 TCHAR 业务。这些 TEXT 宏用于与在 Windows 9x 上运行的代码进行交叉编译。

更改这些行：

LPTSTR windowClass = TEXT("WinApp");
LPTSTR windowTitle = TEXT("Windows Application");

到这里：

LPCWSTR windowClass = L"WinApp";
LPCWSTR windowTitle = L"Windows Application";

然后是 TEXT 宏的所有后续用法，如下所示：

MessageBox(NULL, TEXT("RegisterClassEx Failed!"), TEXT("Error"), MB_ICONERROR);

只是宽字符串：

MessageBox(NULL, L"RegisterClassEx Failed!", L"Error", MB_ICONERROR);