---
description: "Learn more about: IConvertTypeImpl Class"
title: "IConvertTypeImpl Class"
ms.date: "11/04/2016"
f1_keywords: ["ATL.IConvertTypeImpl<T>", "IConvertTypeImpl", "ATL.IConvertTypeImpl", "ATL::IConvertTypeImpl", "ATL::IConvertTypeImpl<T>", "IConvertTypeImpl.CanConvert", "CanConvert", "IConvertTypeImpl::CanConvert"]
helpviewer_keywords: ["IConvertTypeImpl class", "CanConvert method"]
ms.assetid: 7f81e79e-7d3f-4cbe-b93c-d632a94b15f6
---
# IConvertTypeImpl Class

Provides an implementation of the [IConvertType](/previous-versions/windows/desktop/ms715926(v=vs.85)) interface.

## Syntax

```cpp
template <class T>
class ATL_NO_VTABLE IConvertTypeImpl
   : public IConvertType, public CConvertHelper
```

### Parameters

*T*<br/>
Your class, derived from `IConvertTypeImpl`.

## Requirements

**Header:** atldb.h

## Members

### Interface Methods

| Name | Description |
|-|-|
|[CanConvert](#canconvert)|Gives information on the availability of type conversions on a command or on a rowset.|

## Remarks

This interface is mandatory on commands, rowsets, and index rowsets. `IConvertTypeImpl` implements the interface by delegating to the conversion object supplied by OLE DB.

## <a name="canconvert"></a> IConvertTypeImpl::CanConvert

Gives information on the availability of type conversions on a command or on a rowset.

### Syntax

```cpp
STDMETHOD(CanConvert)(DBTYPE wFromType,
   DBTYPE wToType,
   DBCONVERTFLAGS dwConvertFlags);
```

#### Parameters

See [IConvertType::CanConvert](/previous-versions/windows/desktop/ms711224(v=vs.85)) in the *OLE DB Programmer's Reference*.

### Remarks

Uses OLE DB data conversion in `MSADC.DLL`.

## See also

[OLE DB Provider Templates](../../data/oledb/ole-db-provider-templates-cpp.md)<br/>
[OLE DB Provider Template Architecture](../../data/oledb/ole-db-provider-template-architecture.md)