hellowin出错....help
小弟刚开始学WINDOWS程序设计,遇到些问题
#include <windows.h>
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR 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.lpfnWndProc =NULL;
wndclass.lpszClassName =szAppName;
if(!RegisterClass(&wndclass))
{
MessageBox(NULL,TEXT( "This program requires Windows NT! "),szAppName,MB_ICONERROR);
return 0;
}
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( "XXXXX.wav "),NULL,SND_FILENAME|SND_ASYNC);
return 0;
case WM_PAINT:
hdc=BeginPaint(hwnd,&ps);
GetClientRect(hwnd,&rect);
Drawtext(hdc,TEXT( "Hello,Windows98! "),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
EndPaint(hwnd,&ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProw(hwnd,message,wParam,lParam);
}
有3个错误.....
HelloWin.obj : error LNK2001: unresolved external symbol _DefWindowProw
HelloWin.obj : error LNK2001: unresolved external symbol _Drawtext
Debug/HelloWin.exe : fatal error LNK1120: 2 unresolved externals
WHY???
还有一个问题是播放声音的PLAYSOUND函数不需要把文件的路径完整写出的吗??
[解决办法]
DefWindowProw
改成
DefWindowProc
Drawtext
改成
DrawText
[解决办法]
声明一下,这份代码不是我自己写的,是引用一位兄弟的,所以把注释都保留着,LZ自己对照一
下吧。最好能自己背着写一遍,当年我还能写下来,现在都忘了,呵呵
/***********************************************************
Written By Hack-Chul Kang 2003.2.5
Display "Hello Windows " Program
***********************************************************/
#include <windows.h>
//窗口对象的过程处理函数
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
//Windows应用程序的主函数
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, PSTR lpszCmdLine, int iCmdShow)
{
//定义窗口类
TCHAR tcClassName[] = TEXT( "My Window "); //窗口类名字符串
WNDCLASS wc; //窗口类属性描述结构
wc.lpszClassName = tcClassName; //窗口类名
wc.lpszMenuName = NULL; //窗口类菜单资源名
wc.lpfnWndProc = WndProc; //窗口对象的过程处理函数
wc.hInstance = hInstance; //当前进程对象句柄
wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); //窗口背景刷子对象
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); //图标对象
wc.hCursor = LoadCursor(NULL, IDC_ARROW); //光标对象
wc.cbClsExtra = 0; //同类窗口对象公共数据区大小
wc.cbWndExtra = 0; //当前窗口对象私有数据区大小
wc.style = CS_HREDRAW | CS_VREDRAW; //窗口类风格
if (!RegisterClass(&wc)) //注册窗口类
{
//窗口类注册不成功的错误信息
MessageBox(NULL, TEXT( "RegisterClassError! "), TEXT( "Error "), MB_ICONERROR);
return 0;
}
//创建窗口对象
TCHAR tcWindowCaptionName[] = TEXT( "Win32 API "); //窗口对象标题名称
CREATESTRUCT cs; //窗口对象属性描述结构
cs.lpszClass = tcClassName; //窗口类名
cs.lpszName = tcWindowCaptionName; //窗口对象标题名称
cs.style = WS_OVERLAPPEDWINDOW; //窗口对象风格
cs.x = 100; //窗口对象在屏幕上的x坐标
cs.y = 100; //窗口对象在屏幕上的y坐标
cs.cx = 400; //窗口对象的宽度
cs.cy = 300; //窗口对象的高度
cs.hwndParent = NULL; //窗口对象的父窗口句柄
cs.hMenu = NULL; //窗口对象的菜单句柄或子窗口编号
cs.hInstance = hInstance;//当前进程的实例句柄
cs.lpCreateParams = NULL;
//创建窗口对象
HWND hWnd = CreateWindow( cs.lpszClass,
cs.lpszName,
cs.style,
cs.x,
cs.y,
cs.cx,
cs.cy,
cs.hwndParent,
cs.hMenu,
cs.hInstance,
cs.lpCreateParams);
if (hWnd == NULL)
{
//窗口对象创建不成功的错误提示
MessageBox(NULL, TEXT( "CreateWindowError! "), TEXT( "Error! "),MB_ICONERROR);
return 0;
}
//显示窗口对象
ShowWindow(hWnd, iCmdShow);
UpdateWindow(hWnd);//立即刷新窗口对象
//消息检索
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
//检索消息;当检索到WM_QUIT消息时,从消息循环中退出
TranslateMessage(&msg);//进行虚拟键盘消息的转换
DispatchMessage(&msg); //发送消息,由此操作系统调用相应的窗口过程处理消息
}
//主窗口返回
return msg.wParam;
}
//窗口对象的过程处理函数
LRESULT CALLBACK WndProc(HWND hWnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
//消息分类处理
switch (iMsg)
{
//客户区的绘制消息
case WM_PAINT:
{
PAINTSTRUCT ps; //绘制属性结构描述
HDC hDC = BeginPaint(hWnd, &ps); //获取显示设备对象及绘制描述属性
RECT rect;
GetClientRect(hWnd, &rect);//获取当前窗口对象客户区矩形
SetBkMode(hDC,TRANSPARENT);//设置背景方式
SetTextColor(hDC, RGB(255, 0, 0));//设置文本颜色
//绘制文本
DrawText(hDC, TEXT( "Hello, Win32! "), -1, &rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
EndPaint(hWnd, &ps); //客户区绘制结束,归还显示设备对象
return 0;
}
case WM_DESTROY:
{
//发送WM_QUIT消息,通知线程消息检索循环,主程序可以退出
PostQuitMessage(0);
return 0;
}
}
//程序末处理的消息交给window系统的缺省窗口对象的过程处理函数处理
return DefWindowProc(hWnd, iMsg, wParam,lParam);
}
[解决办法]
PlaySound(TEXT( "XXXXX.wav "),NULL,SND_FILENAME|SND_ASYNC);
这句注释掉。
代码先不看,^_^一般是这个有问题。
[解决办法]
加入这一行
wndclass.lpszMenuName = 0 ;
你的程序多了一句
wndclass.lpfnWndProc =NULL;