#include <windows.h>
#include <math.h>
#define COUNT 5
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam);
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
MSG Message;
HWND hWnd = NULL;
TCHAR szAppName[] = TEXT("MainMenu");
WNDCLASS WndClass;
WndClass.style = CS_HREDRAW| CS_VREDRAW;
WndClass.cbClsExtra = 0;
WndClass.cbWndExtra = 0;
WndClass.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));
WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClass.hInstance = hInstance;
WndClass.lpfnWndProc = WndProc;
WndClass.lpszClassName = szAppName;
WndClass.lpszMenuName = szAppName;
if (!RegisterClass(&WndClass))
{
MessageBox(hWnd, TEXT("RegisterClass error"), TEXT("Error"), MB_OK);
return 0;
}
hWnd=CreateWindow(szAppName,
TEXT("菜单测试程序"), WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 500, 400,
NULL, NULL, hInstance, NULL);
ShowWindow(hWnd, nCmdShow);
if( !UpdateWindow(hWnd))
return 0;
while(GetMessage(&Message,0,0,0))
{
TranslateMessage(&Message);
DispatchMessage(&Message);
}
return (int)(Message.wParam);
}
void InitPos(POINT *pPos)
{
int i = 0;
int r = 100;
for (i=0; i<COUNT; ++i)
{
(pPos+i)->x = r * cos((((180 - 2 * (360/COUNT))/2) + ((360/COUNT) * i)) / 360.0 * 2 * 3.14);
(pPos+i)->y = r * sin((((180 - 2 * (360/COUNT))/2) + ((360/COUNT) * i)) / 360.0 * 2 * 3.14);
(pPos+i)->y *= -1;
}
(pPos+COUNT)->x = (pPos+0)->x;
(pPos+COUNT)->y = (pPos+0)->y;
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT iMessage,UINT wParam,LONG lParam)
{
PAINTSTRUCT ps;
HDC hdc;
static POINT iPos[COUNT+1];
static int cx, cy;
switch(iMessage)
{
case WM_CREATE:
InitPos(iPos);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
SetMapMode(hdc, MM_TEXT);
SetViewportOrgEx(hdc, cx / 2, cy / 2, NULL);
Polyline(hdc, iPos, COUNT+1);
EndPaint(hwnd, &ps);
return 0;
case WM_SIZE:
cx = LOWORD(lParam);
cy = HIWORD(lParam);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
break;
}
return DefWindowProc(hwnd,iMessage,wParam,lParam);
}
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