Question

我正在尝试按照有关创建第一个Windows应用程序的入门教程进行操作。它说我应该有这个代码，并能够创建一个基本窗口。

#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>
#include <WinDef.h>


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, 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;


}

它告诉我szClassName未定义，hInst未定义，并且定义了szTile。我错过了一些明显的东西吗？如果这有助于“http://msdn.microsoft.com/en-us/library/bb384843.aspx”，那么这是教程的链接。

Answer 1

错误说明了一切。它看起来像在教程中，他们这样做

static TCHAR szWindowClass[] = _T("win32app");
static TCHAR szTitle[] = _T("Win32 Guided Tour Application");

至于hInst未定义，我不确定。尝试添加这两行，看看它是否有效。我想你会发现它只是忘记了这两行。

你还应该有一个WndProc函数，你可以简单地定义如下：

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
 return DefWindowProc(hWnd, message, wParam, lParam);
}

MSDN Windows应用程序教程麻烦

1 个答案: