---
title: "ViewerBase Class"
canonical: https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_ViewerBase.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# ViewerBase Class
 
This is an abstract class representing a generic viewer control.
 
**Namespace:** [Aurigma.GraphicsMill.WinControls](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_WinControls.htm.md)
 **Assembly:** Aurigma.GraphicsMill.WinControls (in Aurigma.GraphicsMill.WinControls.dll)
 
## Syntax
  
```
Public MustInherit Class ViewerBase _Inherits Control _Implements ICoordinateMapper, IUnitConverter
```
 
```csharp
public abstract class ViewerBase : Control, ICoordinateMapper, IUnitConverter
```
 
## Remarks
  
Typically, there is no need to use this class directly.
 
## Inheritance Hierarchy
  
- [System.Object](http://msdn2.microsoft.com/en-us/e5kfa45b)
    - [System.MarshalByRefObject](http://msdn2.microsoft.com/en-us/w4302s1f)
        - [System.ComponentModel.Component](http://msdn2.microsoft.com/en-us/9wbadbce)
            - [System.Windows.Forms.Control](http://msdn2.microsoft.com/en-us/36cd312w)
                - Aurigma.GraphicsMill.WinControls.ViewerBase
                    - [Aurigma.GraphicsMill.WinControls.BitmapViewer](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_BitmapViewer.htm.md)
                    - [Aurigma.GraphicsMill.WinControls.MultiLayerViewer](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_MultiLayerViewer.htm.md)
 
## Thread Safety
 Static members of this type are safe for multi-threaded operations. Instance members of this type are not safe for multi-threaded operations.
 
## Object Model

[![](https://www.graphicsmill.com/docs/gm5/Aurigma.GraphicsMill.WinControls_ObjectModel_80.png)](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_ViewerBase.htm.md)
![](https://www.graphicsmill.com/docs/gm5/ObjectModel2.png)[![](https://www.graphicsmill.com/docs/gm5/Aurigma.GraphicsMill.WinControls_ObjectModel_81.png)](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_INavigator.htm.md)
![](https://www.graphicsmill.com/docs/gm5/ObjectModel1.png)[![](https://www.graphicsmill.com/docs/gm5/Aurigma.GraphicsMill.WinControls_ObjectModel_82.png)](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_IRubberband.htm.md)
  
## See Also

### Reference

- [ViewerBase Members](https://www.graphicsmill.com/docs/gm5/AllMembers_T_Aurigma_GraphicsMill_WinControls_ViewerBase.htm.md)
- [Aurigma.GraphicsMill.WinControls Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_WinControls.htm.md)