**Inheritance:**
java.lang.Object, [com.aspose.cells.CollectionBase](../../com.aspose.cells/collectionbase)
```
public class VbaProjectReferenceCollection extends CollectionBase
```

Represents all references of VBA project.

**Example**

```
         //Instantiating a Workbook object
         Workbook workbook = new Workbook();
          // Init VBA project.
         VbaProject vbaProject = workbook.getVbaProject();
         // Add vba project reference
         vbaProject.getReferences().addRegisteredReference("stdole", "*\\G{00020430-0000-0000-C000-000000000046}#2.0#0#C:\\Windows\\system32\\stdole2.tlb#OLE Automation");
         //Saving the Excel file
         workbook.save("book1.xlsm");
```
## Methods

| Method | Description |
| --- | --- |
| [add(Object o)](#add-java.lang.Object-) | Adds an item to the CollectionBase instance. |
| [addControlReferernce(String name, String libid, String twiddledlibid, String extendedLibid)](#addControlReferernce-java.lang.String-java.lang.String-java.lang.String-java.lang.String-) | Add a reference to a twiddled type library and its extended type library. |
| [addControlRefrernce(String name, String libid, String twiddledlibid, String extendedLibid)](#addControlRefrernce-java.lang.String-java.lang.String-java.lang.String-java.lang.String-) | Add a reference to a twiddled type library and its extended type library. |
| [addProjectReferernce(String name, String absoluteLibid, String relativeLibid)](#addProjectReferernce-java.lang.String-java.lang.String-java.lang.String-) | Adds a reference to an external VBA project. |
| [addProjectRefrernce(String name, String absoluteLibid, String relativeLibid)](#addProjectRefrernce-java.lang.String-java.lang.String-java.lang.String-) | Adds a reference to an external VBA project. |
| [addRegisteredReference(String name, String libid)](#addRegisteredReference-java.lang.String-java.lang.String-) | Add a reference to an Automation type library. |
| [clear()](#clear--) | Removes all objects from the CollectionBase instance. |
| [contains(Object o)](#contains-java.lang.Object-) | Return whether instance contains this object |
| [copy(VbaProjectReferenceCollection source)](#copy-com.aspose.cells.VbaProjectReferenceCollection-) | Copies references from other VBA project. |
| [equals(Object arg0)](#equals-java.lang.Object-) |  |
| [get(int i)](#get-int-) | Get the reference in the list by the index. |
| [getClass()](#getClass--) |  |
| [getCount()](#getCount--) | Gets the number of elements contained in the CollectionBase instance. |
| [hashCode()](#hashCode--) |  |
| [indexOf(Object o)](#indexOf-java.lang.Object-) | Determines the index of a specific item in the CollectionBase instance. |
| [iterator()](#iterator--) | Returns an enumerator that iterates through the CollectionBase instance. |
| [notify()](#notify--) |  |
| [notifyAll()](#notifyAll--) |  |
| [removeAt(int index)](#removeAt-int-) | Removes the item at the specified index. |
| [toString()](#toString--) |  |
| [wait()](#wait--) |  |
| [wait(long arg0)](#wait-long-) |  |
| [wait(long arg0, int arg1)](#wait-long-int-) |  |
### add(Object o) {#add-java.lang.Object-}
```
public int add(Object o)
```


Adds an item to the CollectionBase instance.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| o | java.lang.Object | The Object to add to the CollectionBase instance. |

**Returns:**
int - The position into which the new element was inserted.
### addControlReferernce(String name, String libid, String twiddledlibid, String extendedLibid) {#addControlReferernce-java.lang.String-java.lang.String-java.lang.String-java.lang.String-}
```
public int addControlReferernce(String name, String libid, String twiddledlibid, String extendedLibid)
```


Add a reference to a twiddled type library and its extended type library.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The name of reference. |
| libid | java.lang.String | The identifier of an Automation type library. |
| twiddledlibid | java.lang.String | The identifier of a twiddled type library |
| extendedLibid | java.lang.String | The identifier of an extended type library |

**Returns:**
int - 
### addControlRefrernce(String name, String libid, String twiddledlibid, String extendedLibid) {#addControlRefrernce-java.lang.String-java.lang.String-java.lang.String-java.lang.String-}
```
public int addControlRefrernce(String name, String libid, String twiddledlibid, String extendedLibid)
```


Add a reference to a twiddled type library and its extended type library.

**Remarks**

NOTE: This method is now obsolete. Instead, please use VbaProjectReferenceCollection.AddControlReferernce() method. This method will be removed 12 months later since July 2026. Aspose apologizes for any inconvenience you may have experienced.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The name of reference. |
| libid | java.lang.String | The identifier of an Automation type library. |
| twiddledlibid | java.lang.String | The identifier of a twiddled type library |
| extendedLibid | java.lang.String | The identifier of an extended type library |

**Returns:**
int - 
### addProjectReferernce(String name, String absoluteLibid, String relativeLibid) {#addProjectReferernce-java.lang.String-java.lang.String-java.lang.String-}
```
public int addProjectReferernce(String name, String absoluteLibid, String relativeLibid)
```


Adds a reference to an external VBA project.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The name of reference. |
| absoluteLibid | java.lang.String | The referenced VBA project's identifier with an absolute path. |
| relativeLibid | java.lang.String | The referenced VBA project's identifier with an relative path. |

**Returns:**
int - 
### addProjectRefrernce(String name, String absoluteLibid, String relativeLibid) {#addProjectRefrernce-java.lang.String-java.lang.String-java.lang.String-}
```
public int addProjectRefrernce(String name, String absoluteLibid, String relativeLibid)
```


Adds a reference to an external VBA project.

**Remarks**

NOTE: This method is now obsolete. Instead, please use VbaProjectReferenceCollection.AddProjectReferernce() method. This method will be removed 12 months later since July 2026. Aspose apologizes for any inconvenience you may have experienced.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The name of reference. |
| absoluteLibid | java.lang.String | The referenced VBA project's identifier with an absolute path. |
| relativeLibid | java.lang.String | The referenced VBA project's identifier with an relative path. |

**Returns:**
int - 
### addRegisteredReference(String name, String libid) {#addRegisteredReference-java.lang.String-java.lang.String-}
```
public int addRegisteredReference(String name, String libid)
```


Add a reference to an Automation type library.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The name of reference. |
| libid | java.lang.String | The identifier of an Automation type library. |

**Returns:**
int - 
### clear() {#clear--}
```
public void clear()
```


Removes all objects from the CollectionBase instance.

### contains(Object o) {#contains-java.lang.Object-}
```
public boolean contains(Object o)
```


Return whether instance contains this object

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| o | java.lang.Object | test object |

**Returns:**
boolean - Whether instance contains this object
### copy(VbaProjectReferenceCollection source) {#copy-com.aspose.cells.VbaProjectReferenceCollection-}
```
public void copy(VbaProjectReferenceCollection source)
```


Copies references from other VBA project.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| source | [VbaProjectReferenceCollection](../../com.aspose.cells/vbaprojectreferencecollection) | The source references. |

### equals(Object arg0) {#equals-java.lang.Object-}
```
public boolean equals(Object arg0)
```




**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| arg0 | java.lang.Object |  |

**Returns:**
boolean
### get(int i) {#get-int-}
```
public VbaProjectReference get(int i)
```


Get the reference in the list by the index.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| i | int | The index. |

**Returns:**
[VbaProjectReference](../../com.aspose.cells/vbaprojectreference) - 
### getClass() {#getClass--}
```
public final native Class<?> getClass()
```




**Returns:**
java.lang.Class<?>
### getCount() {#getCount--}
```
public int getCount()
```


Gets the number of elements contained in the CollectionBase instance.

**Returns:**
int - The number of elements contained in the CollectionBase instance.
### hashCode() {#hashCode--}
```
public native int hashCode()
```




**Returns:**
int
### indexOf(Object o) {#indexOf-java.lang.Object-}
```
public int indexOf(Object o)
```


Determines the index of a specific item in the CollectionBase instance.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| o | java.lang.Object | Determines the index of a specific item in the CollectionBase instance. |

**Returns:**
int - The index of value if found in the list; otherwise, -1.
### iterator() {#iterator--}
```
public Iterator iterator()
```


Returns an enumerator that iterates through the CollectionBase instance.

**Returns:**
java.util.Iterator - An iterator for the CollectionBase instance.
### notify() {#notify--}
```
public final native void notify()
```




### notifyAll() {#notifyAll--}
```
public final native void notifyAll()
```




### removeAt(int index) {#removeAt-int-}
```
public void removeAt(int index)
```


Removes the item at the specified index.

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| index | int | The zero-based index of the item to remove. |

### toString() {#toString--}
```
public String toString()
```




**Returns:**
java.lang.String
### wait() {#wait--}
```
public final void wait()
```




### wait(long arg0) {#wait-long-}
```
public final native void wait(long arg0)
```




**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| arg0 | long |  |

### wait(long arg0, int arg1) {#wait-long-int-}
```
public final void wait(long arg0, int arg1)
```




**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| arg0 | long |  |
| arg1 | int |  |