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How do I selectively hide or show the Context Tooltip in EditControl ?

Platform: WinForms |
Control: EditControl |
Published Date: April 30, 2011 |
Last Revised Date: July 10, 2014


The Context Tooltip can be selectively hidden or shown using the UpdateContextTooltip event. The following code shows how the Context Tooltip can be displayed only if the mouse cursor moves over a Keyword, for the rest of the text, the Context Tooltip is not displayed.


private void editControl1_UpdateContextToolTip(object sender, Syncfusion.Windows.Forms.Edit.Dialogs.UpdateTooltipEventArgs e)


if( e.Text == string.Empty )


Point pointVirtual = editControl1.PointToVirtualPosition( new Point( e.X, e.Y ) );

if( pointVirtual.Y > 0 )


// Get the current line

ILexemLine line = editControl1.GetLine( pointVirtual.Y );

if( line != null )


// Get tokens from the current line

ILexem lexem = line.FindLexemByColumn( pointVirtual.X );

if( lexem != null )


IConfigLexem configLexem = lexem.Config as IConfigLexem;

string formatName = configLexem.Format.Name;

if (formatName == "KeyWord")


e.Text = "This is a " + formatName + " : " + lexem.Text;








Private Sub editControl1_UpdateContextToolTip(sender As Object, e As Syncfusion.Windows.Forms.Edit.Dialogs.UpdateTooltipEventArgs) Handles editControl1.UpdateContextToolTip

If e.Text = String.Empty Then

Dim pointVirtual As Point = editControl1.PointToVirtualPosition(New Point(e.X, e.Y))

If pointVirtual.Y > 0 Then

' Get the current line

Dim line As ILexemLine = editControl1.GetLine(pointVirtual.Y)

If Not (line Is Nothing) Then

' Get tokens from the current line

Dim lexem As ILexem = line.FindLexemByColumn(pointVirtual.X)

If Not (lexem Is Nothing) Then

Dim configLexem As IConfigLexem = lexem.Config

Dim formatName As String = configLexem.Format.Name

If formatName = "KeyWord" Then

e.Text = "This is a " + formatName + " : " + lexem.Text

End If

End If

End If

End If

End If

End Sub 'editControl1_UpdateContextToolTip

Please refer to the test sample attached below for more information.

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