win32编程

[li4c]

我按照《Windows程序设计里面（第五版）》里面的例子编的代码，为执行结果和书上的不一样，我也不太懂，不知道是什么问题。
这个是我的代码

#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.cbWndExtra   =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 is programer requires Windows NT!!"), szAppName, MB_ICONERROR);
		return 0;
	}
	hwnd =CreateWindow (szAppName,
						TEXT("The Hello programe"),
						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.avi"),NULL,SND_FILENAME | SND_ASYNC);
		return 0;*/
	case WM_PAINT:
		hdc =BeginPaint(hwnd,&ps);
		GetClientRect (hwnd, &rect);
		DrawText(hdc,TEXT ("Hello,Windows 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);
}

我的代码的运行结果

下面是粘贴随书附带光盘上的代码，感觉一样的啊

/*------------------------------------------------------------
   HELLOWIN.C -- Displays "Hello, Windows 98!" in client area
                 (c) Charles Petzold, 1998
  ------------------------------------------------------------*/

#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.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;

     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("This program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }
     
     hwnd = CreateWindow (szAppName,                  // window class name
                          TEXT ("The Hello Program"), // window caption
                          WS_OVERLAPPEDWINDOW,        // window style
                          CW_USEDEFAULT,              // initial x position
                          CW_USEDEFAULT,              // initial y position
                          CW_USEDEFAULT,              // initial x size
                          CW_USEDEFAULT,              // initial y size
                          NULL,                       // parent window handle
                          NULL,                       // window menu handle
                          hInstance,                  // program instance handle
                          NULL) ;                     // creation parameters
     
     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_ASYNC) ;
          return 0 ;*/
          
     case WM_PAINT:
          hdc = BeginPaint (hwnd, &ps) ;
          
          GetClientRect (hwnd, &rect) ;
          
          DrawText (hdc, TEXT ("Hello, Windows 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) ;
}

书上代码的结果

[要追问请引用回复]

WNDCLASS wndclass = {sizeof(wndclass)};

[li4c]

引用 1 楼 my3439955 的回复:

WNDCLASS wndclass = {sizeof(wndclass)};

不懂事什么意思

[碼上道]

wndclass.cbClsExtra 你没有设置好。你设置了两个cbWndExtra

[li4c]

引用 3 楼 jerry_dqh 的回复:

wndclass.cbClsExtra 你没有设置好。你设置了两个cbWndExtra

阿里嘎多，我看到了，80分收好