#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/