求救 在校实训项目万年历、实时时钟遇到难处，请求大神帮助。。
本帖最后由 u011305601 于 2013-12-19 14:55:38 编辑
#include "public.h"
#include <math.h>
#define ID_TIMER 1
#define TWOPI (2 * 3.14159)
/*略去部分

LRESULT CALLBACK MClock(HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
static int cxClient, cyClient ;
static SYSTEMTIME stPrevious ;
BOOL fChange ;
HDC hdc ;
PAINTSTRUCT ps ;
SYSTEMTIME st ;

switch (message)
{
case WM_CREATE :
SetTimer (hwnd, ID_TIMER, 1000, NULL) ;
GetLocalTime (&st) ;
stPrevious = st ;
return 0 ;

case WM_SIZE :
cxClient = LOWORD (lParam) ;
cyClient = HIWORD (lParam) ;
return 0 ;

case WM_TIMER :
GetLocalTime (&st) ;

fChange = st.wHour!= stPrevious.wHour ||
st.wMinute != stPrevious.wMinute ;

hdc = GetDC (hwnd) ;

SetIsotropic (hdc, cxClient, cyClient) ;

SelectObject (hdc, GetStockObject (WHITE_PEN)) ;
DrawHands (hdc, &stPrevious, fChange) ;

SelectObject (hdc, GetStockObject (BLACK_PEN)) ;
DrawHands (hdc, &st, TRUE) ;

ReleaseDC (hwnd, hdc) ;

stPrevious = st ;
return 0 ;

case WM_PAINT :
hdc = BeginPaint (hwnd, &ps) ;

SetIsotropic (hdc, cxClient, cyClient) ;
DrawClock (hdc) ;
DrawHands (hdc, &stPrevious, TRUE) ;

EndPaint (hwnd, &ps) ;
return 0 ;

case WM_DESTROY :
KillTimer (hwnd, ID_TIMER) ;
PostQuitMessage (0) ;
return 0 ;
}
return TRUE;
}


INT_PTR ShowMClock()
{
return DialogBox(g_hInst,MAKEINTRESOURCE(IDD_DIALOG2),g_hMainWnd,MClock);
}
[解决办法]
LRESULT CALLBACK MClock(HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)

==>
BOOL CALLBACK MClock(HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)