TreeView.NodeMouseHover Event
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Occurs when the mouse hovers over a TreeNode.
public:
event System::Windows::Forms::TreeNodeMouseHoverEventHandler ^ NodeMouseHover;public event System.Windows.Forms.TreeNodeMouseHoverEventHandler NodeMouseHover;public event System.Windows.Forms.TreeNodeMouseHoverEventHandler? NodeMouseHover;member this.NodeMouseHover : System.Windows.Forms.TreeNodeMouseHoverEventHandler Public Custom Event NodeMouseHover As TreeNodeMouseHoverEventHandler Event Type
Examples
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the NodeMouseHover event. This report helps you learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.
To run the example code, paste it into a project that contains an instance of type TreeView named TreeView1. Then ensure that the event handler is associated with the NodeMouseHover event.
private void TreeView1_NodeMouseHover(Object sender, TreeNodeMouseHoverEventArgs e) {
System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Node", e.Node );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "NodeMouseHover Event" );
}
Private Sub TreeView1_NodeMouseHover(sender as Object, e as TreeNodeMouseHoverEventArgs) _
Handles TreeView1.NodeMouseHover
Dim messageBoxVB as New System.Text.StringBuilder()
messageBoxVB.AppendFormat("{0} = {1}", "Node", e.Node)
messageBoxVB.AppendLine()
MessageBox.Show(messageBoxVB.ToString(),"NodeMouseHover Event")
End Sub
Remarks
If the mouse is located over a TreeNode, the NodeMouseHover event will occur before the MouseHover event.
For more information about how to handle events, see Handling and Raising Events.
