[Solved] c# windows form in form as part of the ihm

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Im’ really sorry guys, yeah i just had to make my borderstyle none.

Really sorry to made you loose your time, and thanks for the answer 

 Reports rep = new Reports();
  rep.FormBorderStyle = FormBorderStyle.None;
  rep.MdiParent = this;
  rep.Show();

solved c# windows form in form as part of the ihm