用GetSystemTime制作一个电子表

Question

我想用GetSystemtime();得到系统时间并用TEXTOUT（）；显示出来要一直更新时间，就好像桌面右下角的时钟一样，那位高手能给我代码啊

Answer 1

设定一个 1 秒的定时器即可：
::SetTimer(...);

Answer 2

http://www.codeproject.com/KB/dialog/YetAnotherClock.aspx
我年前帮别人做的

Answer 3

得到当前时间不要使用GetSystemTime，这个函数是获取伦敦洛林威治时间的，要使用GetLocalTime,以下是数字时钟的代码：
#pragma comment(lib,"WINMM.lib")
#include "mmsystem.h"
void DrawDigit(HDC hDC,int number)
{
static BOOL fSegment[10][7]={ 1,1,1,0,1,1,1,
                          0,0,1,0,0,1,0,
  1,0,1,1,1,0,6,
  1,0,1,1,0,1,1,
  0,1,1,1,0,1,0,
  1,1,0,1,0,1,1,
  1,1,0,1,1,1,1,
  1,1,1,0,0,1,0,
  1,1,1,1,1,1,1,
  1,1,1,1,0,1,1
                            };
static POINT pCoordinate[7][6]={
                                      7,6,11,2,31,2,35,6,31,10,11,10,
  6,7,10,11,10,31,6,35,2,31,2,11,
  36,7,40,11,40,31,36,35,32,31,32,11,
  7,36,11,32,31,32,35,36,31,40,11,40,
  6,37,10,41,10,61,6,65,2,61,2,41,
  36,37,40,41,40,61,36,65,32,61,32,41,
  7,66,11,62,31,62,35,66,31,70,11,70
                               };
for(int i=0;i<7;++i)
{
if(fSegment[number][i])
Polygon(hDC,pCoordinate[i],6);
}
}
void DrawTwoDigits(HDC hDC,int number,BOOL bSupress)
{
    if(!bSupress||number/10!=0)
DrawDigit(hDC,number/10); OffsetWindowOrgEx(hDC,-42,0,NULL); DrawDigit(hDC,number%10); OffsetWindowOrgEx(hDC,-42,0,NULL);
}void DrawColon(HDC hdc)
{
static POINT ptColon[2][4]={
                           2,21,6,17,10,21,6,25,
   2,51,6,47,10,51,6,55
                           };
Polygon(hdc,ptColon[0],4);
Polygon(hdc,ptColon[1],4);
OffsetWindowOrgEx(hdc,-12,0,NULL);
}void DrawTime(HDC hDC,BOOL fb24Hour,BOOL bSuppress)
{
    SYSTEMTIME sysTime;
GetLocalTime(&sysTime); if(fb24Hour)
{
DrawTwoDigits(hDC,sysTime.wHour,bSuppress);
}
else
{
DrawTwoDigits(hDC,sysTime.wHour%12 ?sysTime.wHour:12,bSuppress);
}
DrawColon(hDC);
DrawTwoDigits(hDC,sysTime.wMinute,FALSE);
DrawColon(hDC);
DrawTwoDigits(hDC,sysTime.wSecond,FALSE);}void GetTimeInformation(BOOL& fB24Hour,BOOL& fSuppress,TCHAR* szHourFormat,TCHAR* szLZero)
{
GetLocaleInfo(LOCALE_SYSTEM_DEFAULT,LOCALE_ITIME,szHourFormat,3);
GetLocaleInfo(LOCALE_SYSTEM_DEFAULT,LOCALE_ILZERO,szLZero,3);
fB24Hour=(szHourFormat[0]==_T('1')?1:0);
fSuppress=(szLZero[0]==_T('0')?1:0);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
    static HBRUSH hRedBrush;
    TCHAR szHourFormat[3];
TCHAR szLZero[3];
static BOOL fB24Hour;
static BOOL fSuppress;
static int cxClient,cyClient;
    RECT rect;
switch (message)
{
case WM_CREATE:

GetTimeInformation(fB24Hour,fSuppress,szHourFormat,szLZero);
hRedBrush=CreateSolidBrush(RGB(255,0,0));
SetTimer(hWnd,IDC_TIMER,1000,NULL);
break;
case WM_SETTINGCHANGE:
GetTimeInformation(fB24Hour,fSuppress,szHourFormat,szLZero);
InvalidateRect(hWnd,NULL,TRUE);
break;
case WM_SIZE:
        cxClient=LOWORD(lParam);
cyClient=HIWORD(lParam);
break;

case WM_TIMER:

rect.left=0;
rect.top=cyClient/3-20;
rect.bottom=2*cyClient/3+20;
rect.right=cxClient;
PlaySound(_T("C:\\WINDOWS\\Media\\ding.wav"),NULL,SND_ASYNC|SND_FILENAME);
InvalidateRect(hWnd,&rect,TRUE);
break;

case WM_PAINT:
hdc = BeginPaint(hWnd, &ps); SetMapMode(hdc,MM_ISOTROPIC);
SetWindowExtEx(hdc,276,72,NULL);
SetViewportExtEx(hdc,cxClient,cyClient,NULL);
SetWindowOrgEx(hdc,138,36,NULL); SetViewportOrgEx(hdc,cxClient/2,cyClient/2,NULL);

SelectObject(hdc,GetStockObject(NULL_PEN));
SelectObject(hdc,hRedBrush);
DrawTime(hdc,fB24Hour,fSuppress);
// TODO: 在此添加任意绘图代码...
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
KillTimer(hWnd,IDC_TIMER);
DeleteObject(hRedBrush);
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}