---
title: "BitmapChangingEventArgs Class"
canonical: https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_BitmapChangingEventArgs.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/)

# BitmapChangingEventArgs Class
 
Provides data for pre-changing events of the [Bitmap](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Bitmap.htm.md) class.
 
**Namespace:** [Aurigma.GraphicsMill](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public Class BitmapChangingEventArgs _Inherits EventArgs
```
 
```csharp
public class BitmapChangingEventArgs : EventArgs
```
 
## Remarks
  
This class is used by such events as:
 
- [Changing](https://www.graphicsmill.com/docs/gm5/E_Aurigma_GraphicsMill_Bitmap_Changing.htm.md)
- [Redoing](https://www.graphicsmill.com/docs/gm5/E_Aurigma_GraphicsMill_Bitmap_Redoing.htm.md)
- [Undoing](https://www.graphicsmill.com/docs/gm5/E_Aurigma_GraphicsMill_Bitmap_Undoing.htm.md)

This class contains property [Change](https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_BitmapChangingEventArgs_Change.htm.md) which specifies what action did change the bitmap. All possible change actions are described with [BitmapChange](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_BitmapChange.htm.md) enumeration. Using property [Cancel](https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_BitmapChangingEventArgs_Cancel.htm.md) you can cancel operation before it is being started.
 
## Inheritance Hierarchy
  
- [System.Object](http://msdn2.microsoft.com/en-us/e5kfa45b)
    - [System.EventArgs](http://msdn2.microsoft.com/en-us/118wxtk3)
        - Aurigma.GraphicsMill.BitmapChangingEventArgs
   
## See Also

### Reference

- [BitmapChangingEventArgs Members](https://www.graphicsmill.com/docs/gm5/AllMembers_T_Aurigma_GraphicsMill_BitmapChangingEventArgs.htm.md)
- [Aurigma.GraphicsMill Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill.htm.md)