刚学windows编程，下面代码错误。不知何解

C/C++ code

 
 #include  <windows.h> 
 LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); 
 int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) 
 { 
     static TCHAR szAppName[] = TEXT ("xx"); 
     HWND         hwnd; 
     MSG          msg; 
     WNDCLASSEX   wndclassex = {0}; 
     wndclassex.cbSize        = sizeof(WNDCLASSEX); 
     wndclassex.style         = CS_HREDRAW | CS_VREDRAW; 
     wndclassex.lpfnWndProc   = WndProc; 
     wndclassex.cbClsExtra    = 0; 
     wndclassex.cbWndExtra    = 0; 
     wndclassex.hInstance     = hInstance; 
     wndclassex.hIcon         = LoadIcon (NULL, IDI_APPLICATION); 
     wndclassex.hCursor       = LoadCursor (NULL, IDC_ARROW); 
     wndclassex.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH); 
     wndclassex.lpszMenuName  = NULL; 
     wndclassex.lpszClassName = szAppName; 
     wndclassex.hIconSm       = wndclassex.hIcon; 
  
     if (!RegisterClassEx (&wndclassex)) 
     { 
         MessageBox (NULL, TEXT ("RegisterClassEx failed!"), szAppName, MB_ICONERROR); 
         return 0; 
     } 
     hwnd = CreateWindowEx (WS_EX_OVERLAPPEDWINDOW,  
                   szAppName,  
                   TEXT ("good"), 
                   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; 
 SCROLLINFOsi; 
 TEXTMETRIC  tm; 
  
 static struct   
 { 
 int   idStockFont; 
 char * szStockFont; 
 } 
 stockfont[] = 
 { 
 OEM_FIXED_FONT,"OEM_FIXED_FONT", 
 ANSI_FIXED_FONT,    "ANSI_FIXED_FONT", 
 ANSI_VAR_FONT,"ANSI_VAR_FONT", 
 SYSTEM_FONT,"SYSTEM_FONT", 
 DEVICE_DEFAULT_FONT,"DEVICE_DEFAULT_FONT", 
 SYSTEM_FIXED_FONT,  "SYSTEM_FIXED_FONT", 
 DEFAULT_GUI_FONT,   "DEFAULT_GUI_FONT" 
 }; 
 int i; 
     static int iFont, cFont = sizeof(stockfont)/sizeof(stockfont[0]); 
 static int cxChar, cyChar, cxClient, cyClient, iVerPos;  
 
 TCHAR  szFaceName[LF_FACESIZE], szBuffer[LF_FACESIZE + 64]; 
     switch (message) 
     { 
     case WM_CREATE: 
 hdc = GetDC(hwnd); 
 GetTextMetrics(hdc, &tm); 
 cxChar = tm.tmAveCharWidth; 
 cyChar = tm.tmHeight+tm.tmExternalLeading; 
 GetTextMetrics(hdc, &tm); 
  
 ReleaseDC(hwnd, hdc); 
         return (0); 
 case WM_SIZE: 
  
 cyClient = LOWORD(lParam); 
 si.cbSize = sizeof(si); 
 si.fMask  = SIF_RANGE | SIF_POS; 
  
 si.nMax = cFont-1; 
 si.nMin = 0; 
 si.nPage = cyClient/cyChar; 
 SetScrollInfo(hwnd, SB_VERT, &si, TRUE); 
 return(0); 
  
     case WM_PAINT: 
         hdc = BeginPaint (hwnd, &ps); 
  
 for(i = 0; i  < cFont; i++) 
 { 
 SelectObject(hdc, GetStockObject(stockfont[i].idStockFont)); 
 GetTextFace(hdc, LF_FACESIZE, szFaceName); 
 GetTextMetrics(hdc, &tm); 
 TextOut(hdc, 0, i+3, szBuffer,  
     wsprintf(szBuffer, TEXT("%s: Face Name = %s, CharSet = %s"), stockfont[i].szStockFont, 
 szFaceName, tm.tmCharSet)); 
 } 
          
         EndPaint (hwnd, &ps); 
         return (0); 
 case WM_VSCROLL: 
 si.cbSize = sizeof(si); 
 si.fMask = SIF_ALL; 
 GetScrollInfo(hwnd, SB_VERT, &si); 
 iVerPos = si.nPos; 
 switch (LOWORD(wParam)) 
 { 
 case SB_TOP: 
 si.nPos = 0; 
 break; 
 case SB_BOTTOM: 
 si.nPos = cFont-1; 
 break; 
 case SB_PAGEUP: 
 si.nPos -= si.nPage; 
 break; 
 case SB_PAGEDOWN: 
 si.nPos += si.nPage; 
 break; 
 case SB_THUMBPOSITION: 
 si.nPos = si.nTrackPos; 
 break; 
 default: 
 break; 
 } 
 SetScrollInfo(hwnd, SB_VERT, &si, TRUE); 
 si.fMask = SIF_POS; 
 GetScrollInfo(hwnd, SB_VERT, &si); 
 if( iVerPos != si.nPos) 
 { 
 ScrollWindow(hwnd, 0, (iVerPos - si.nPos)*cyChar, NULL, NULL); 
 UpdateWindow(hwnd); 
 } 
  
 return(0); 
  
     case WM_DESTROY: 
         PostQuitMessage (0); 
         return (0); 
     } 
     return DefWindowProc (hwnd, message, wParam, lParam); 
 } 
 

// 发觉windows 程序调试和 C语言调试 大不一样，希望前辈能够 教我下如何 调试windows程序，跳入系统函数都是汇编代码，跳过又 进不了 窗口过程，。。。非常不解。。



[解决办法]
窗口过程

ctrl+F10
[解决办法]
设置断点后用F5 运行到断点
之后，可以F10按函数运行
也可以F11进入函数


[解决办法]
设置断点后用F5 运行到断点
之后，可以F10按函数运行
也可以F11进入函数
[解决办法]
1. 系统API你没办法看到源码的，跟踪进去也没用。
2. 由于windows程序是基于消息机制的，所以你也办法一口气跟踪到LRESULT CALLBACK WndProc 函数中，应该在此函数中设置断点后全速运行，等程序停在断点处再继续跟踪。CALLBACK这种类型的函数是系统帮你调用的，你只有等待它被调用后，才能跟踪下去。