from comtypes.client import *
    from comtypes.automation import *
    def connect_acad(self):
        errcode = 0
        try:
            self.acad = GetActiveObject("AutoCAD.Application")
        except:
            errcode = 1
        if errcode == 0:
            try:
                self.dwg = self.acad.ActiveDocument
            except:
                errcode = 2
        if errcode == 0:
            self.mspace = self.dwg.ModelSpace
        return errcode
    def mark_point(self, xy, num, lay):
        
        def point(*args):
            lst = [0.]*3
            if len(args) < 3:
                lst[0:2] = [float(x) for x in args[0:2]]
            else:
                lst = [float(x) for x in args[0:3]]
            return VARIANT(array("d",lst))
        
        txthght = 1.0
        txtshft = 0.3
        crclrd = 0.3
        p1 = point(xy[0], xy[1])
        ent = self.mspace.AddCircle(p1, crclrd)
        ent.Layer = lay
        #htch = self.mspace.AddHatch(0, 'SOLID', False)
        #htch.AppendOuterLoop(array("i", [ent,]))
        #htch.Evaluate()
        #htch.Layer = lay
        p1 = point(xy[0]+txtshft, xy[1]+txtshft)
        sh = len(num)
        if (len(self.nprefix) > 0) and (len(num.replace(self.nprefix, '')) > 3):
            sh = sh // 2
        th = string.Template('\H'+str(txthght)+';$n')
        ent = self.mspace.AddMText(p1, sh, th.substitute(n=num))
        ent.LineSpacingFactor = 0.7
        ent.Layer = lay