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我是学习使用 C++ 创建 WIN32 程序的新手,但是,当我按照一本书的说明尝试创建我的第一个程序时,我遇到了以下问题

#include <windows.h>

const char g_szClassName[] = "myWindowClass";

//Step 4: the Window Procedure
LRESULT CALLBACK WndProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
    case WM_CLOSE:DestroyWindow(hwnd); break;
    case WM_DESTROY:PostQuitMessage(0); break;
    deafult:
        return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wc;
HWND hwnd;
MSG Msg;

//Step 1: Registering the Window Class
wc.cbSize       =sizeof(WNDCLASSEX);
wc.style        =0;
wc.lpfnWndProc  =WndProc;
wc.cbClsExtra   =0;
wc.cbWndExtra   =0;
wc.hInstance    =hInstance;
wc.hIcon        =LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor      =LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName =NULL;
wc.lpszClassName=g_szClassName;
wc.hIconSm      =LoadIcon(NULL, IDI_APPLICATION);

if(!RegisterClassEx(&wc))
{
    MessageBox(NULL, "Window Registration Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
    return 0;
}

//Step 2: Creating the Window
hwnd = CreateWindowEx(WS_EX_CLIENTEDGE, g_szClassName, "The title of my window", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 240, 120, NULL, NULL, hInstance, NULL);
if(hwnd == NULL)
{
    MessageBox(NULL, "Window Creation Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
    return 0;
}

ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);

//Step 3: The Message Loop
while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
    TranslateMessage(&Msg);
    DispatchMessage(&Msg);
}
return Msg.wParam;
}

但它一直返回“窗口创建失败!”,我不知道它有什么问题,我已经做了很多校对。请帮我!

4

1 回答 1

11
case WM_CLOSE:DestroyWindow(hwnd); break;
case WM_DESTROY:PostQuitMessage(0); break;
deafult:
    return DefWindowProc(hwnd, msg, wParam, lParam);

可能很难看到,而且因为它是一个普通标签而编译起来很残酷(尽管我从 得到警告-Wunused-label),但是你拼错了default. 这会导致WM_NCCREATE无法处理,从而导致您的窗口创建失败。

值得注意的是,您的处理WM_CLOSE方式与 相同DefWindowProc,只是调用DestroyWindow. 您可以忽略这种情况,但在关闭窗口时仍然会发生同样的事情。

于 2013-07-23T08:13:28.343 回答