제라툴입니다..

아래소스를 참고 하시죠.. ^^

Win32SDK로 사인 그래프를 그리는 프로그램입니다..

#include <windows.h>
#include <math.h>

#define NUM 500
#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("SineWave");
    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 = LoadIcon(NULL, IDI_APPLICATION);
    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 requres Windows NT!"),szAppName, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(szAppName, TEXT("Sine Wave Using Polyline"),
                        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;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static int cxClient, cyClient;
    HDC hdc;
    int i;
    PAINTSTRUCT ps;
    POINT apt[NUM];

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

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

        MoveToEx(hdc, 0, cyClient/2, NULL);
        LineTo(hdc, cxClient, cyClient/2);
       
        for(i = 0 ; i < NUM ; i++)
        {
            apt[i].x = i * cxClient / NUM;
            apt[i].y = (int) (cyClient / 2 * ( 1 - sin(TWOPI * i / NUM)));
        }
        Polyline (hdc, apt, NUM);
        return 0;

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}

정확한 사이 그래프인지는 잘모르고.. 화면의 크기에 맞게 사이그래프 형태로 나타나도록
되어있는 프로그램입니다..^^

---- 아름다운 청년 제라툴 ----