Omit this parameter if you dont need multiple tooltips to appear simultaneously. If the coordinates are omitted, the tooltip will be shown near the mouse cursor.

That would be easy if our X axis was DateAxis or CategoryAxis: just add an XYCursor and set tooltipText for all series: let lineSeries ( new am4charts. Now we want to display a tooltip for all series over same hovered X value. The ToolTip will flicker a bit when moving the mouse, but once it's still there won't be a problem. The X and Y position of the tooltip relative to the active window (use CoordMode, ToolTip to change to screen coordinates). This means we are using ValueAxis for both X and Y.

Private Sub DataGridView1_CellMouseLeave(sender As Object, e As ) Handles DataGridView1.CellMouseLeave ToolTip1.Show('Details.', Me, Me.PointToClient(cp)) PreviousCursorPos Cursor.Position Then 'If the mouse is not in the same position as before, then execute the code. If e.RowIndex >= 0 AndAlso e.ColumnIndex >= 0 AndAlso _ Private Sub DataGridView1_CellMouseMove(sender As Object, e As ) Handles DataGridView1.CellMouseMove I used the CellMouseMove and CellMouseLeave events instead to save you the additional checking if the mouse is over a cell: Dim PreviousCursorPos As New Point(-1, -1)

The simplest way to fix this is to make it check wether the mouse has moved or not since the last time MouseMove was called, then only reshow the ToolTip if the mouse has moved. When it regains the focus the MouseMove event gets called again which causes the ToolTip to close and reshow itself again, and so it continues infinitely, eating CPU and some RAM, until you move the mouse outside a cell. After some testing it appears that once the ToolTip is shown, the DataGridView temporarily loses focus.

Disable bluestacks x y cursor tooltip