给我写一个在VC6.0++画驻波的程序

好的，下面是一个简单的VC6.0++程序，可以画出驻波图形。

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

#define PI 3.14159265358979323846

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASS wc;
    HWND hWnd;
    MSG msg;

    memset(&wc, 0, sizeof(wc));
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszClassName = TEXT("MyClass");
    RegisterClass(&wc);

    hWnd = CreateWindow(TEXT("MyClass"), TEXT("驻波图形"), WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 640, 480, NULL, NULL, hInstance, NULL);

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static int cxClient, cyClient;
    static TCHAR szText[] = TEXT("驻波图形");
    static HPEN hPen;
    static HDC hdc;
    static double f = 0;

    switch (message)
    {
    case WM_CREATE:
        hdc = GetDC(hWnd);
        hPen = CreatePen(PS_SOLID, 2, RGB(0, 0, 255));
        SelectObject(hdc, hPen);
        break;

    case WM_SIZE:
        cxClient = LOWORD(lParam);
        cyClient = HIWORD(lParam);
        break;

    case WM_PAINT:
        {
            PAINTSTRUCT ps;
            hdc = BeginPaint(hWnd, &ps);
            SetBkMode(hdc, TRANSPARENT);

            int x1, x2, y1, y2;

            //绘制坐标轴
            MoveToEx(hdc, 10, cyClient / 2, NULL);
            LineTo(hdc, cxClient - 10, cyClient / 2);
            MoveToEx(hdc, cxClient / 2, 10, NULL);
            LineTo(hdc, cxClient / 2, cyClient - 10);

            //绘制驻波图形
            for (int i = -cxClient / 2; i <= cxClient / 2; i++)
            {
                x1 = i;
                y1 = (int)(cyClient / 2 * (1 + sin(2 * PI * i / 80 + f)));
                x2 = x1 + 1;
                y2 = (int)(cyClient / 2 * (1 + sin(2 * PI * (i + 1) / 80 + f)));
                MoveToEx(hdc, cxClient / 2 + x1, y1, NULL);
                LineTo(hdc, cxClient / 2 + x2, y2);
            }

            f += 0.02;

            EndPaint(hWnd, &ps);
        }
        break;

    case WM_DESTROY:
        DeleteObject(hPen);
        ReleaseDC(hWnd, hdc);
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }

    return 0;
}

程序中使用了sine函数来绘制驻波图形，sin函数中的参数可以根据需要进行调整，可以得到不同的驻波图形。同时使用`WM_SIZE`消息获取窗口大小，使得驻波图形可以自适应窗口大小。