How to solve error c1190 : MFC requires to use Winsock2.h ?

errors the c1189 : MFC requires to use winsock2.h

#pragma once

#ifdef _WINDOWS_
#undef _WINDOWS_
#endif

#include <Afx.h>
#include <afxwin.h>
#include <atlimage.h>
#include <math.h>

class Object{
public:
    CImage Image;
    short int x,y;
};

class Theme : public CWnd{
private:
    
protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

public:
    CWnd  *Parent;
    CPoint cursor;
    bool drag;
    CString path,imagepath;
    char DialogMove;//0==top to center - 1==center to top - 2==center to down - 3==down to center
    char code,sb;//code = 0=main page - sb=show button=1=ascedung,-1=desceding;
    short int iimage,bstart,bend,//i = index of images-b = index of buttons
    ib;//ib=index of button for clicking and do code
    short int w, h,D;
    float ani_p, ani_max;
    bool ani,mousec;
    CRect WRect,rdesktop;
    CDC *cdc;
    short int lani;
    HWND hwndani;
    Object *Image;
    CRect *Rect;
    bool *BEnable;//enable of buttons-1 = enable
    unsigned char ButtonCount,ImageCount,SysButtonCount;
    bool Transparent;
    int EndMsg;//0=WM_CLOSE        1=PostMessage(IDOK)

    void GotoPage(unsigned char PageNo,unsigned char BStart,unsigned char BEnd);
    void ClearRect(short i,short j,COLORREF color);
    bool IsIn(CPoint point,CRect rect);
    bool IsInRect(CPoint point,CRect rect,CRect Rectangle);
    void Center2Top(int);
    void Top2Center();
    void Down2Center();
    void Center2Down();
    bool AddImage(unsigned char Index,CString ImagePath,unsigned short int X,short int Y);
    void AddButton(unsigned char Index,CRect rectangle,bool enable);
    void DrawImages(unsigned char alpha,int IImage);
    //Theme(unsigned char imagecount,unsigned char buttoncount,unsigned char sysbuttoncount);
    void Init(unsigned char imagecount,unsigned char buttoncount,unsigned char sysbuttoncount);
    ~Theme(void);
    bool CreateTheme(CRect rect,CWnd *parent,unsigned short int W,unsigned short int H,bool transparent);
    afx_msg void OnPaint();
    afx_msg void OnTimer(UINT_PTR nIDEvent);
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
    
    DECLARE_MESSAGE_MAP()
};