VS2022 MFC 运用什么技术可以实现区域不闪屏的效果，请用代码说明？

VS2022 MFC 运用什么技术可以实现区域不闪屏的效果，请用代码说明？

void CWindows::OnMouseMove(UINT nFlags, CPoint point)

{

// TODO: 在此添加消息处理程序代码和/或调用默认值

if (isMouseMove) // 判断鼠标是否移动到元件栏

{

   // 获取鼠标坐标  

   //Invalidate();

   //UpdateWindow();

   this->left = point.x - 50;

   this->right = point.x + 50;

   this-> top = point.y - 50;

   this-> bottom = point.y + 50;

   CRect rect(this->left,this->top,this->right,this->bottom);

   InvalidateRect(rect, true);

   //LockWindowUpdate(); // Remove the parameter as LockWindowUpdate does not take any arguments.

}

else

{

   isMouseMove = true;  

}

CDialogEx::OnMouseMove(nFlags, point);

}