---
title: "Bitmap..::.UnlockBits Method "
canonical: https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Bitmap_UnlockBits_1_ed2555df.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/)

# Bitmap.UnlockBits Method 
 
Unlocks previously locked area of bitmap with [LockBits(Int32, Int32, Int32, Int32)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Bitmap_LockBits_4_951ae041.htm.md) method.
 
**Namespace:** [Aurigma.GraphicsMill](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public Sub UnlockBits ( _bitmapData As BitmapData _
)
```
 
```csharp
public void UnlockBits(BitmapData bitmapData
)
```
 
### Parameters
 
 - bitmapData
     - Type: [Aurigma.GraphicsMill.BitmapData](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_BitmapData.htm.md)
 [BitmapData](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_BitmapData.htm.md) object previously returned with [LockBits(Int32, Int32, Int32, Int32)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Bitmap_LockBits_4_951ae041.htm.md) method.
 
## Remarks
  
Each call of [LockBits(Int32, Int32, Int32, Int32)](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Bitmap_LockBits_4_951ae041.htm.md) should be followed with subsequent UnlockBits(BitmapData) method call. You cannot lock bits one more time until you unlock them with this method. You can check if bits are locked with [BitsLocked](https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Bitmap_BitsLocked.htm.md) property.
   
## See Also

### Reference

- [Bitmap Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Bitmap.htm.md)
- [Aurigma.GraphicsMill Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill.htm.md)