The OnBeforeDrawingObjects Method is available in LEADTOOLS Document and Medical Imaging toolkits.
- e
- An RasterCollection<AnnPaintEventArgs> that contains the event data.
Syntax
| Visual Basic (Declaration) | |
|---|---|
Protected Overridable Sub OnBeforeDrawingObjects( _ ByVal e As AnnPaintEventArgs _ ) | |
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As AnnContainer Dim e As AnnPaintEventArgs instance.OnBeforeDrawingObjects(e) | |
| C# | |
|---|---|
protected virtual void OnBeforeDrawingObjects( AnnPaintEventArgs e ) | |
| C++/CLI | |
|---|---|
protected: virtual void OnBeforeDrawingObjects( AnnPaintEventArgs^ e ) | |
Parameters
- e
- An RasterCollection<AnnPaintEventArgs> that contains the event data.
Example
For an example, refer to BeforeDrawingObjects.
Remarks
Raising an event invokes the event handler through a delegate. The OnBeforeDrawingObjects method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class. Notes to Inheritors: When overriding OnBeforeDrawingObjects in a derived class, be sure to call the base class's OnBeforeDrawingObjects method so that registered delegates receive the event.
Requirements
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7