获取文本框的行数和列数

 int LineIndex=0,LineNum=0,SelStar=0,ColNum=0;
   LineNum =  ::SendMessage(Form5->RichEdit1->Handle,EM_LINEFROMCHAR,(WPARAM)-1,0);//行数
  LineIndex = ::SendMessage(Form5->RichEdit1->Handle,EM_LINEINDEX,(WPARAM)-1,0);
  SelStar = (int)LOWORD(::SendMessage(Form5->RichEdit1->Handle,EM_GETSEL,NULL,NULL));
   ColNum = SelStar - LineIndex;  //列数


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