#include?
#include??

#define?ID_TIMER????1
#define?TWOPI???????（2?*?3.14159）

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

int?WINAPI?WinMain?（HINSTANCE?hInstance?HINSTANCE?hPrevInstance
????????????????????PSTR?szCmdLine?int?iCmdShow）
{
?????static?TCHAR?szAppName[]?=?TEXT?（“Clock“）?;
?????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?????????=?NULL?;
?????wndclass.hCursor???????=?LoadCursor?（NULL?IDC_ARROW）?;
?????wndclass.hbrBackground?=?（HBRUSH）?GetStockobject?（WHITE_BRUSH）?;
?????wndclass.lpszMenuName??=?NULL?;
?????wndclass.lpszClassName?=?szAppName?;
?????
?????if?（!RegisterClass?（&wndclass））
?????{
??????????MessageBox?（NULL?TEXT?（“Program?requires?Windows?NT!“）?
??????????????????????szAppName?MB_IConerror）?;
??????????return?0?;
?????}
?????
?????hwnd?=?CreateWindow?（szAppName?TEXT?（“Analog?Clock“）
??????????????????????????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?;
}

void?SetIsotropic?（HDC?hdc?int?cxClient?int?cyClient）
{
?????SetMapMode?（hdc?MM_ISOTROPIC）?;
?????SetWindowExtEx?（hdc?1000?1000?NULL）?;
?????SetViewportExtEx?（hdc?cxClient?/?2?-cyClient?/?2?NULL）?;
?????SetViewportOrgEx?（hdc?cxClient?/?2??cyClient?/?2?NULL）?;
}

void?RotatePoint?（POINT?pt[]?int?iNum?int?iAngle）
{
?????int???i?;
?????POINT?ptTemp?;
?????
?????for?（i?=?0?;?i??????{
??????????ptTemp.x?=?（int）?（pt[i].x?*?cos?（TWOPI?*?iAngle?/?360）?+
???????????????pt[i].y?*?sin?（TWOPI?*?iAngle?/?360））?;
??????????
??????????ptTemp.y?=?（int）?（pt[i].y?*?cos?（TWOPI?*?iAngle?/?360）?-
???????????????pt[i].x?*?sin?（TWOPI?*?iAngle?/?360））?;
??????????
??????????pt[i]?=?ptTemp?;
?????}
}

void?DrawClock?（HDC?hdc）
{
?????int???iAngle?;
?????POINT?pt[3]?;
?????
?????for?（iAngle?=?0?;?iAngle??????{
??????????pt[0].x?=???0?;
??????????pt[0].y?=?900?;
??????????
??????????RotatePoint?（pt?1?iAngle）?;
??????????
??????????pt[2].x?=?pt[2].y?=?iAngle?%?5???33?:?100?;
??????????
??????????pt[0].x?-=?pt[2].x?/?2?;
??????????pt[0].y?-=?pt[2].y?/?2?;
??????????
??????????pt[1].x??=?pt[0].x?+?pt[2].x?;
??????????pt[1].y??=?pt[0].y?+?pt[2].y?;
??????????
??????????Selectobject?（hdc?GetStockobject?（BLACK_BRUSH））?;
??????????
??????????Ellipse?（hdc?pt[0].x?pt[0].y?pt[1].x?pt[1].y）?;
????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-12-08?10:34??Clock\
?????文件????????5513??2013-12-08?10:34??Clock\Clock.c
?????文件?????????875??2009-09-25?12:05??Clock\Clock.sln
?????文件????????8192??2009-09-25?12:05??Clock\Clock.suo
?????文件????????5055??2009-09-25?12:05??Clock\Clock.vcproj
?????目錄???????????0??2013-12-08?10:34??Clock\Debug\
?????文件??????485888??2009-09-25?12:05??Clock\Debug\Clock.exe
?????目錄???????????0??2013-12-08?10:34??Clock\Release\
?????文件???????64000??2009-09-25?12:05??Clock\Release\Clock.exe