How to highlight the error line in Edit control?

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Edit control supports to highlight the error lines. It can be achieved using below functions,

RegisterUnderlineFormat: Used to set custom underline format. It contains the below parameter.

Color: Used to set the underline custom color.

UnderlineStyle: Used to set the Style of the underlining, like as Dash, DashDot, Dot, Solid, Wave.

UnderlineWeight: Used to set the Weight of the underlining like as Bold, Double, Double Bold, Thin.

SetUnderline: Used to set the underline in specified text region.

RemoveUnderLine: Used to remove the underline in specified region.

The following code demonstrates same.

ISnippetFormat format;
 
format = editControl1.RegisterUnderlineFormat(Color.Red, Syncfusion.Windows.Forms.Edit.Enums.UnderlineStyle.Solid, Syncfusion.Windows.Forms.Edit.Enums.UnderlineWeight.Bold);
 
 
 
// To draw underline                     
       this.editControl1.SetUnderline(this.editControl1.Selection.Top, this.editControl1.Selection.Bottom, format);                  
 
// To remove underline
 
this.editControl1.RemoveUnderline(this.editControl1.Selection.Top, this.editControl1.Selection.Bottom);

 
ISnippetFormat format
 
format = editControl1.RegisterUnderlineFormat(Color.Red, Syncfusion.Windows.Forms.Edit.Enums.UnderlineStyle.Solid, Syncfusion.Windows.Forms.Edit.Enums.UnderlineWeight.Bold)
 
' To draw underline
     Me.editControl1.SetUnderline(Me.editControl1.Selection.Top,Me.editControl1.Selection.Bottom, format)
 
' To remove the selection
Me.editControl1.RemoveUnderline(Me.editControl1.Selection.Top,Me.editControl1.Selection.Bottom)

Screenshot

Showing error line

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How to highlight the error line in Edit control?

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