WM_USER+1

switch(m.Msg) {
            case winApi.WM_USER:
                ival1=(int)m.WParam;
                ival2=(int)m.LParam;
                if(ival1>=0)
                    matterProgress.Value=ival1; //完成发布,100%
                if(ival2>=0)
                    mediaProgress.Value=ival2;//-1，未发布
                if(ival2==100) {
                    bClose=true;
                    Close();
                }
                break;
            }