Windows编程解决办法

Windows编程
/*-------------------------------------------
  POEPOEM.C -- Demonstrates Custom Resource
  (c) Charles Petzold, 1998
  -------------------------------------------*/
 
#include <windows.h>
#include "resource.h"

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

HINSTANCE hInst ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
  PSTR szCmdLine, int iCmdShow)
{
  TCHAR szAppName [16], szCaption [64], szErrMsg [64] ;
  HWND hwnd ;
  MSG msg ;
  WNDCLASS wndclass ;
   
  LoadString (hInstance, IDS_APPNAME, szAppName, 
  sizeof (szAppName) / sizeof (TCHAR)) ;

  LoadString (hInstance, IDS_CAPTION, szCaption, 
  sizeof (szCaption) / sizeof (TCHAR)) ;
   
  wndclass.style = CS_HREDRAW | CS_VREDRAW ;
  wndclass.lpfnWndProc = WndProc ;
  wndclass.cbClsExtra = 0 ;
  wndclass.cbWndExtra = 0 ;
  wndclass.hInstance = hInstance ;
  wndclass.hIcon = LoadIcon (hInstance, szAppName) ;
  wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
  wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
  wndclass.lpszMenuName = NULL ;
  wndclass.lpszClassName = szAppName ;
   
  if (!RegisterClass (&wndclass))
  {
  LoadStringA (hInstance, IDS_APPNAME, (char *) szAppName, 
  sizeof (szAppName)) ;

  LoadStringA (hInstance, IDS_ERRMSG, (char *) szErrMsg, 
  sizeof (szErrMsg)) ;

  MessageBoxA (NULL, (char *) szErrMsg, 
  (char *) szAppName, MB_ICONERROR) ;
  return 0 ;
  }
   
  hwnd = CreateWindow (szAppName, szCaption,
  WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN,
  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)
{
  static char * pText ;
  static HGLOBAL hResource ;
  static HWND hScroll ;
  static int iPosition, cxChar, cyChar, cyClient, iNumLines, xScroll ;
  HDC hdc ;
  PAINTSTRUCT ps ;
  RECT rect ;
  TEXTMETRIC tm ;

  switch (message)
  {
  case WM_CREATE :
  hdc = GetDC (hwnd) ;
  GetTextMetrics (hdc, &tm) ;
  cxChar = tm.tmAveCharWidth ;
  cyChar = tm.tmHeight + tm.tmExternalLeading ;
  ReleaseDC (hwnd, hdc) ;
   
  xScroll = GetSystemMetrics (SM_CXVSCROLL) ;
   
  hScroll = CreateWindow (TEXT ("scrollbar"), NULL,
  WS_CHILD | WS_VISIBLE | SBS_VERT,
  0, 0, 0, 0,

  hwnd, (HMENU) 1, hInst, NULL) ;
   
  hResource = LoadResource (hInst, 
  FindResource (hInst, TEXT ("AnnabelLee"),
  TEXT ("TEXT"))) ;
   
  pText = (char *) LockResource (hResource) ;
  iNumLines = 0 ;
   
  while (*pText != '\\' && *pText != '\0')
  {
  if (*pText == '\n')
  iNumLines ++ ;
  pText = AnsiNext (pText) ;
  }
  *pText = '\0' ;
   
  SetScrollRange (hScroll, SB_CTL, 0, iNumLines, FALSE) ;
  SetScrollPos (hScroll, SB_CTL, 0, FALSE) ;
  return 0 ;
   
  case WM_SIZE :
  MoveWindow (hScroll, LOWORD (lParam) - xScroll, 0,
  xScroll, cyClient = HIWORD (lParam), TRUE) ;
  SetFocus (hwnd) ;
  return 0 ;
   
  case WM_SETFOCUS :
  SetFocus (hScroll) ;
  return 0 ;
   
  case WM_VSCROLL :
  switch (wParam)
  {
  case SB_TOP :
  iPosition = 0 ;
  break ;
  case SB_BOTTOM :
  iPosition = iNumLines ;
  break ;
  case SB_LINEUP :
  iPosition -= 1 ;
  break ;
  case SB_LINEDOWN :
  iPosition += 1 ;
  break ;
  case SB_PAGEUP :
  iPosition -= cyClient / cyChar ;
  break ;
  case SB_PAGEDOWN :
  iPosition += cyClient / cyChar ;
  break ;
  case SB_THUMBPOSITION :
  iPosition = LOWORD (lParam) ;
  break ;
  }
  iPosition = max (0, min (iPosition, iNumLines)) ;
   
  if (iPosition != GetScrollPos (hScroll, SB_CTL))
  {
  SetScrollPos (hScroll, SB_CTL, iPosition, TRUE) ;
  InvalidateRect (hwnd, NULL, TRUE) ;
  }
  return 0 ;
   
  case WM_PAINT :
  hdc = BeginPaint (hwnd, &ps) ;
   
  pText = (char *) LockResource (hResource) ;
   
  GetClientRect (hwnd, &rect) ;
  rect.left += cxChar ;
  rect.top += cyChar * (1 - iPosition) ;
  DrawTextA (hdc, pText, -1, &rect, DT_EXTERNALLEADING) ;

  EndPaint (hwnd, &ps) ;
  return 0 ;
   
  case WM_DESTROY :
  FreeResource (hResource) ;
  PostQuitMessage (0) ;
  return 0 ;
  }
  return DefWindowProc (hwnd, message, wParam, lParam) ;
}
为什么提示Poepoem.c.exe 中的 0x00c81a2a 处有未经处理的异常: 0xC0000005: 读取位置 0x00000000 时发生访问冲突

[解决办法]
说明你访问了NULL指针指向的内存了，就是说你有个地方没判指针是否空就访问了
[解决办法]
建议单步调试，定位出错的那一行
------解决方案--------------------

首先代码没有问题，我用win7 x64 sp1(关UAC)+ vc6.0 sp6测试了。

估计是资源什么的缺少或者工程文件有错吧，建议直接使用下载原书中工程进行对比，找出问题