---
title: "CustomFormatReader Constructor "
canonical: https://www.graphicsmill.com/docs/gm5/C_Aurigma_GraphicsMill_Codecs_CustomFormatReader_ctor.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/)

# CustomFormatReader Constructor 
 
Creates and initializes a new [CustomFormatReader](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_CustomFormatReader.htm.md) class instance.
 
**Namespace:** [Aurigma.GraphicsMill.Codecs](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Protected Sub New
```
 
```csharp
protected CustomFormatReader()
```
 
## Remarks
  
The constructor for this class should specify the default properties of your reader, for example, its name, description, supported MIME type, and so on. This can be done by calling the following methods:
 
- [SetDefaultExtension(String)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_CustomFormatReader_SetDefaultExtension_1_bb3a7a4f.htm.md)
- [SetFilterString(String)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_CustomFormatReader_SetFilterString_1_bb3a7a4f.htm.md)
- [SetFormatDescription(String)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_CustomFormatReader_SetFormatDescription_1_bb3a7a4f.htm.md)
- [SetFormatName(String)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_CustomFormatReader_SetFormatName_1_bb3a7a4f.htm.md)
- [SetMediaFormat(Int64)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_CustomFormatReader_SetMediaFormat_1_5f4f955f.htm.md)
- [SetMimeType(String)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_CustomFormatReader_SetMimeType_1_bb3a7a4f.htm.md)
   
## See Also

### Reference

- [CustomFormatReader Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_CustomFormatReader.htm.md)
- [Aurigma.GraphicsMill.Codecs Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)