c# - Resizing pictureBox and changing minimumsize -

so have code resizing picturebox:

class sizeablepicturebox : picturebox {     public sizeablepicturebox()     {         this.resizeredraw = true;      }     protected override void onpaint(painteventargs e)     {         base.onpaint(e);         var rc = new rectangle(this.clientsize.width - grab, this.clientsize.height - grab, grab, grab);         controlpaint.drawsizegrip(e.graphics, this.backcolor, rc);     }     protected override void wndproc(ref message m)     {         base.wndproc(ref m);         if (m.msg == 0x84)         {  // trap wm_nchittest             var pos = this.pointtoclient(new point(m.lparam.toint32() & 0xffff, m.lparam.toint32() >> 16));             if (pos.x >= this.clientsize.width - grab && pos.y >= this.clientsize.height - grab)                 m.result = new intptr(17);  // ht_bottomright         }     }     private const int grab = 16; } 

i found here on stackoverflow, , works great. however, change minimumsize on it, since can't scale down enough. after point, stops downscaling.