Επεξεργασία

Κοινή χρήση μέσω

ErrObject.HelpContext Property

  • Reference

Definition

Namespace:
Microsoft.VisualBasic
Assembly:
Microsoft.VisualBasic.Core.dll
Assembly:
Microsoft.VisualBasic.dll
Source:
ErrObject.vb
Source:
ErrObject.vb
Source:
ErrObject.vb

Returns or sets an Integer containing the context ID for a topic in a Help file. Read/write.

public:
 property int HelpContext { int get(); void set(int value); };
public int HelpContext { get; set; }
member this.HelpContext : int with get, set
Public Property HelpContext As Integer

Property Value

Int32

Returns or sets an Integer containing the context ID for a topic in a Help file. Read/write.

Examples

This example uses the HelpContext property of the Err object to show the Visual Basic Help topic for the Overflow error.

Dim Msg As String
Err.Clear()
On Error Resume Next   ' Suppress errors for demonstration purposes.
Err.Raise(6)   ' Generate "Overflow" error.
If Err.Number <> 0 Then
  Msg = "Press F1 or HELP to see " & Err.HelpFile & " topic for" & 
  " the following HelpContext: " & Err.HelpContext
  MsgBox(Msg, , "Error:")
End If

Remarks

The HelpContext property is used to display context-sensitive Help for an application. If a Help file is specified in HelpFile, the HelpContext property is used to automatically display the Help file identified. If both the HelpFile and HelpContext properties are empty, the value of the Number property is checked. If the value of the Number property corresponds to a Visual Basic run-time error value, then the Visual Basic Help context ID for the error is used. If the value of the Number property does not correspond to a Visual Basic error, the contents screen for the Visual Basic Help file is displayed.

Note

You should write routines in your application to handle typical errors. When programming with an object, you can use the object's Help file to improve the quality of your error handling, or to display a meaningful message to your user if the error is not recoverable.

Applies to

See also