My Code is given below which has parameters used for window control
ContentWindow.Width = 1145;
ContentWindow.Height = 523;
//ContentWindow.Header = new TextBlock() { Text = "iFIS Reports", FontSize = 10, FontWeight = FontWeights.Bold };
ContentWindow.Left = 222;
ContentWindow.Top = 81;
ContentWindow.WindowStartupLocation = Telerik.Windows.Controls.
WindowStartupLocation.Manual;
ContentWindow.WindowState =
WindowState.Normal;
//ContentWindow.TopOffset = 1000;
//ContentWindow.LeftOffset = 1000;
ContentWindow.RestoreMinimizedLocation =
false;
ContentWindow.ResizeMode = Telerik.Windows.Controls.
ResizeMode.CanResize;
ContentWindow.CanClose =
false;
ContentWindow.CanMove =
false;
ContentWindow.RestoreMinimizedLocation =
false;
//ContentWindow.RestrictedAreaMargin.Height= 500;
//ContentWindow.RenderSize.Width = 100;
ContentWindow.Show();