> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CheckmarkGroup Object (ICheckmarkGroup Interface)

> CheckmarkGroup object (ICheckmarkGroup interface) in the ABBYY FineReader Engine API — Group of CheckmarkBlock objects; exposes standard collection functionality plus min/max selected-checkmark settings; derived from IBlock.

This object represents a group of checkmark blocks ([CheckmarkBlock](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock) objects). The ICheckmarkGroup interface is derived from the [IBlock](/fine-reader/engine/api-reference/layout-related-objects/block) interface and inherits all its properties.

Besides the standard collection functionality the CheckmarkGroup object allows you to set the maximum and minimum number of selected checkmarks in the group.

* The indexing of ABBYY FineReader Engine collections starts with 0.
* The foreach statement in C# (for each in Visual Basic .NET) can be used to manipulate the collection.

## Properties

| Name | Type | Description |
| - | - | - |
| Count | [int](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties), read-only | Stores the number of elements in the group. |
| [Element](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/element-property) | [CheckmarkBlock](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock), [read-only](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties#readonly_properties) | Provides access to a single element of the group. |
| MaximumCheckedInGroup | [int](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties) | Specifies the maximum number of selected checkmark blocks in the group. The default value is -1, which means that all checkmark blocks in the group can be selected. |
| MinimumCheckedInGroup | [int](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties) | Specifies the minimum number of selected checkmark blocks in the group. The default value is 0. |

## Methods

| Name | Description |
| - | - |
| [AddNew](/fine-reader/engine/api-reference/layout-related-objects/checkmarkgroup/addnew-method) | Creates a checkmark block and inserts it into the specified position in the group. |
| [DeleteAll](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/deleteall-method) | Removes all the elements from the group. |
| [DeleteAt](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/deleteat-method) | Removes an element from the group. |
| [Item](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/item-method) | Provides access to a single element of the group of checkmark blocks. |

## Related objects

<img src="https://mintcdn.com/abbyy/6udH-pkk8zkVafYH/images/fine-reader/engine/checkmarkgroup.gif?s=8a67a9826b397e3ef9684a0e748a79cc" alt="CheckmarkGroup" width="285" height="151" data-path="images/fine-reader/engine/checkmarkgroup.gif" />[](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/element-property)[](/fine-reader/engine/api-reference/supplementary-objects-and-methods/region)[](/fine-reader/engine/visual-components-reference/supplementary-objects/spellwordcollection/element-property)[](/fine-reader/engine/api-reference/layout-related-objects/layout#blocks)[](/fine-reader/engine/api-reference/supplementary-objects-and-methods/region)[](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock)[](/fine-reader/engine/api-reference/layout-related-objects/block)[](/fine-reader/engine/api-reference/layout-related-objects/layoutblocks)[](/fine-reader/engine/api-reference/layout-related-objects/layout)

[Object Diagram](/fine-reader/engine/api-reference/object-diagram)

## Output parameter

This object is the output parameter of the [GetAsCheckmarkGroup](/fine-reader/engine/api-reference/layout-related-objects/block/getascheckmarkgroup-method) method of the [Block](/fine-reader/engine/api-reference/layout-related-objects/block) object.

## See also

[Block](/fine-reader/engine/api-reference/layout-related-objects/block)

[CheckmarkBlock](/fine-reader/engine/api-reference/layout-related-objects/checkmarkblock)

[Working with Layout and Blocks](/fine-reader/engine/guided-tour/advanced-techniques/working-with-layout-and-blocks)

[Recognizing Checkmarks](/fine-reader/engine/guided-tour/advanced-techniques/recognizing-checkmarks)

[Working with Collections](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-collections)

[Working with Properties](/fine-reader/engine/guided-tour/advanced-techniques/programming-aspects/working-with-properties)