Thanks Erik for your hint, it actually works like a charm ;)
Indeed setting a MinimumWidth results in a bigger box after all, quite obvious if I think about it ;)

Have a great weekend and best regards
Andy

Set the minimum width in the MessageBoxManager if you want it to have a minimum size.

Hi Stefaniya,

that was what I initially expected to happen.
I have set the MaximumWidth as shown below, but the box is always the same size... it doesn't change the size regardless what I enter for MaximumWidth (I also tried it using 25 and 2500 as values... all the same).

            UltraMessageBoxInfo messageinfo = new UltraMessageBoxInfo
                                                  {
                                                      Style = MessageBoxStyle.Standard,
                                                      Buttons = MessageBoxButtons.OK,
                                                      Icon = MessageBoxIcon.Exclamation,
                                                      DefaultButton = MessageBoxDefaultButton.Button1
                                                  };
 
            messageinfo.ButtonAppearance.FontData.Bold = DefaultableBoolean.True;
            messageinfo.ButtonAreaAppearance.BackColor = Color.LightSteelBlue;
            messageinfo.Owner = this;
            
            messageinfo.Caption = String.Format(caption);
 
            messageinfo.Header = header;
            messageinfo.MaximumWidth = 1000;
 
 
            messageinfo.TextFormatted = body;
 
            messageinfo.FooterFormatted = footer;
 
 
            this.mbmMain.ShowMessageBox(messageinfo);

 Please be so kind and advise,
best regards
Andy