ToolStripDropDown.HelpRequested 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 user requests help for a control.
public:
event System::Windows::Forms::HelpEventHandler ^ HelpRequested;[System.ComponentModel.Browsable(false)]
public event System.Windows.Forms.HelpEventHandler HelpRequested;[System.ComponentModel.Browsable(false)]
public event System.Windows.Forms.HelpEventHandler? HelpRequested;[<System.ComponentModel.Browsable(false)>]
member this.HelpRequested : System.Windows.Forms.HelpEventHandler Public Custom Event HelpRequested As HelpEventHandler Event Type
- Attributes
Examples
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the HelpRequested event. This report helps you to 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 ToolStripDropDown named ToolStripDropDown1. Then ensure that the event handler is associated with the HelpRequested event.
private void ToolStripDropDown1_HelpRequested(Object sender, HelpEventArgs e) {
System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "MousePos", e.MousePos );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Handled", e.Handled );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "HelpRequested Event" );
}
Private Sub ToolStripDropDown1_HelpRequested(sender as Object, e as HelpEventArgs) _
Handles ToolStripDropDown1.HelpRequested
Dim messageBoxVB as New System.Text.StringBuilder()
messageBoxVB.AppendFormat("{0} = {1}", "MousePos", e.MousePos)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Handled", e.Handled)
messageBoxVB.AppendLine()
MessageBox.Show(messageBoxVB.ToString(),"HelpRequested Event")
End Sub
Remarks
For more information about handling events, see Handling and Raising Events.
