#include <stdio.h>
#include <windows.h>

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, WPARAM);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR szCmdLine, int    iCmdShow)

{
static TCHAR szAppName[] = TEXT ("HelloWin");
HWND  hwnd;
MSG msg;
WNDCLASS wndclass;

wndclass.style =  CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra= 0 ;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor (NULL,IDC_ARROW);
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;

if (!RegisterClass (&wndclass))
{
   MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR);
}
hwnd = CreateWindow (szAppName,
                    TEXT ("The Hello Program"),
                    WS_OVERLAPPEDWINDOW,
                    CW_USEDEFAULT,
                    CW_USEDEFAULT,
                    CW_USEDEFAULT,
                    CW_USEDEFAULT,
                    NULL,
                    NULL,
                    hInstance,
                    NULL);
                    ShowWindow (hwnd, iCmdShow);
                    UpdateWindow (hwnd);
                    while (GetMessage (&msg, NULL, 0, 0))
                    {TranslateMessage(&msg);
                    DispatchMessage (&msg);
                    }
                    return msg.wParam;

}


LRESULT CALLBACK Wndproc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC  hdc;
PAINTSTRUCT ps;
RECT  rect;

switch (message)
/*case WM_CREATE;
PlaySound (TEXT("hellowin.wav"), NULL, SND_FILENAME|SND_ASYNCE);
return 0; */
{case WM_PAINT:
hdc = BeginPaint (hwnd,&ps);
GetClientRect (hwnd, &rect);
DrawText (hdc, TEXT ("Hello, Win 98!"), -1, &rect, DT_SINGLELINE|DT_CENTER|DT_VCENTER);
EndPaint (hwnd, &ps);
return 0;

case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc (hwnd,message, wParam, lParam);
}


你好,
我试图复制出Petzold的“编程窗口”。大部分情况下进展顺利。但是,当我尝试编译时,出现了wndclass.lpfnWndProc错误。我尝试查找是否可能是操作系统问题,但无济于事。顺便说一句,该错误说明了有关无效转换为LRESULT的问题.....但是我找不到任何解决方案,所以我想知道这是否是操作系统问题(是长点之类的)还是什么。并且,如果有任何站点可以帮助更好地“现代化”这本书,将不胜感激。谢谢
扎克

最佳答案

修正这两种错别字后:

LRESULT CALLBACK WndProc ( HWND, UINT, WPARAM, LPARAM );
LRESULT CALLBACK WndProc ( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )


我发现代码可以编译并正常运行:

C:\TEMP>cl test.c user32.lib gdi32.lib
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 15.00.30729.01 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.

test.c
Microsoft (R) Incremental Linker Version 9.00.30729.01
Copyright (C) Microsoft Corporation.  All rights reserved.

/out:test.exe
test.obj
user32.lib
gdi32.lib

C:\TEMP>test.exe

关于c - Petzold编程窗口中的代码(导致窗口错误),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/9164659/

10-14 18:34
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