CONNECT程序

#define MAX_POINTS 1000LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){int wmId, wmEvent,i,j;PAINTSTRUCT ps;HDC hdc;static POINT pt[MAX_POINTS];static iCount;switch (message) {case WM_LBUTTONDOWN:iCount=0;InvalidateRect(hWnd,NULL,TRUE);break;case WM_MOUSEMOVE:if(wParam&MK_LBUTTON&&iCount<1000){pt[iCount].x=LOWORD(lParam);pt[iCount++].y=HIWORD(lParam);hdc=GetDC(hWnd);SetPixel(hdc,LOWORD(lParam),HIWORD(lParam),0);ReleaseDC(hWnd,hdc);}break;case WM_LBUTTONUP:InvalidateRect(hWnd,NULL,TRUE);break;case WM_COMMAND:wmId = LOWORD(wParam); wmEvent = HIWORD(wParam); // Parse the menu selections:switch (wmId){case IDM_ABOUT: DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About); break;case IDM_EXIT: DestroyWindow(hWnd); break;default: return DefWindowProc(hWnd, message, wParam, lParam);}break;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);// TODO: Add any drawing code here...SetCursor(LoadCursor(NULL,IDC_WAIT));ShowCursor(TRUE);for(i=0;i<iCount-1;i++){for(j=i+1;j<iCount;j++){MoveToEx(hdc,pt[i].x,pt[i].y,NULL);LineTo(hdc,pt[j].x,pt[j].y);}}ShowCursor(FALSE);SetCursor(LoadCursor(NULL,IDC_ARROW));EndPaint(hWnd, &ps);break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, message, wParam, lParam); } return 0;}