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- #include <Windows.h>
- #include <strsafe.h>
- #include "SysMets.h"
- #include <math.h>
- #define NUM 1000
- #define TWOPI (2 * 3.14159)
- LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
- int WINAPI WinMain(HINSTANCE hInstance,
- HINSTANCE hPrevInstance,
- LPSTR lpCmdLine,
- int nShowCmd) {
- static TCHAR szAppName[] = TEXT("Bill");
- HWND hwnd;
- WNDCLASS wndclass;
- MSG msg;
-
- wndclass.cbClsExtra = 0;
- wndclass.cbWndExtra = 0;
- wndclass.hInstance = hInstance;
- wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
- wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
- wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
- wndclass.lpszClassName = szAppName;
- wndclass.lpszMenuName = NULL;
- wndclass.lpfnWndProc = WndProc;
- wndclass.style = CS_HREDRAW | CS_VREDRAW;
- RegisterClass(&wndclass);
- hwnd = CreateWindow(TEXT("Bill"), TEXT("Tip"), WS_OVERLAPPEDWINDOW | WS_HSCROLL | WS_VSCROLL,
- CW_USEDEFAULT, 40, CW_USEDEFAULT, 100,
- NULL, NULL, hInstance, NULL);
- ShowWindow(hwnd, nShowCmd);
- UpdateWindow(hwnd);
- while (GetMessage(&msg, NULL, 0, 0)) {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- return 0;
- }
- LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
- WPARAM wParam, LPARAM lParam) {
- HDC hdc;
- static int cxClient, cyClient;
- int i;
- PAINTSTRUCT ps;
- static POINT apt[4];
-
- switch (message) {
- case WM_CREATE:
- return 0;
- case WM_PAINT:
- hdc = BeginPaint(hwnd, &ps);
- PolyBezier(hdc, apt, 4);
- EndPaint(hwnd, &ps);
- return 0;
- case WM_LBUTTONDOWN:
- hdc = GetDC(hwnd);
- SelectObject(hdc, GetStockObject(WHITE_PEN));
- PolyBezier(hdc, apt, 4);
- apt[1].x = LOWORD(lParam);
- apt[1].y = HIWORD(lParam);
- SelectObject(hdc, GetStockObject(BLACK_PEN));
- PolyBezier(hdc, apt, 4);
- ReleaseDC(hwnd, hdc);
- return 0;
- case WM_RBUTTONDOWN:
- hdc = GetDC(hwnd);
- SelectObject(hdc, GetStockObject(WHITE_PEN));
- PolyBezier(hdc, apt, 4);
- apt[2].x = LOWORD(lParam);
- apt[2].y = HIWORD(lParam);
- SelectObject(hdc, GetStockObject(BLACK_PEN));
- PolyBezier(hdc, apt, 4);
- ReleaseDC(hwnd, hdc);
- return 0;
- case WM_SIZE:
- cxClient = LOWORD(lParam);
- cyClient = HIWORD(lParam);
- apt[0].x = cxClient / 4;
- apt[0].y = cyClient / 2;
- apt[1].x = cxClient / 2;
- apt[1].y = cyClient / 4;
- apt[2].x = cxClient / 2;
- apt[2].y = cyClient * 3 / 4;
- apt[3].x = cxClient * 3 / 4;
- apt[3].y = cyClient / 2;
- return 0;
- case WM_DESTROY:
- PostQuitMessage(0);
- return 0;
- default:
- return DefWindowProc(hwnd, message, wParam, lParam);
- }
- }
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