IWiaDevMgr2 interface
The IWiaDevMgr2 interface is used to create and manage image acquisition devices and to register to receive device events.
Members
The IWiaDevMgr2 interface inherits from the IUnknown interface. IWiaDevMgr2 also has these types of members:
Methods
The IWiaDevMgr2 interface has these methods.
| Method | Description |
|---|---|
| CreateDevice | Creates a hierarchical tree of IWiaItem2 objects for a WIA 2.0 device. |
| EnumDeviceInfo | Creates an enumerator of property information for each available WIA 2.0 device. |
| GetImageDlg | The IWiaDevMgr2::GetImageDlg method displays one or more dialog boxes that enable a user to acquire an image from a WIA 2.0 device and write the image to a specified file. This method extends the functionality of IWiaDevMgr2::SelectDeviceDlg to encapsulate image acquisition within a single API call. |
| RegisterEventCallbackCLSID | The IWiaDevMgr2::RegisterEventCallbackCLSID method registers an application to receive events even if the application is not running. |
| RegisterEventCallbackInterface | Registers a running application for WIA 2.0 event notification. |
| RegisterEventCallbackProgram | The IWiaDevMgr2::RegisterEventCallbackProgram method registers an application to receive device events. It is primarily provided for backward compatibility with applications that were not written for WIA 2.0. |
| SelectDeviceDlg | Displays a dialog box that enables the user to select a hardware device for image acquisition. |
| SelectDeviceDlgID | Displays a dialog box that enables the user to select a hardware device for image acquisition. |
Remarks
The IWiaDevMgr2 interface, like all Component Object Model (COM) interfaces, inherits the IUnknown interface methods.
| IUnknown Methods | Description |
|---|---|
| IUnknown::QueryInterface | Returns pointers to supported interfaces. |
| IUnknown::AddRef | Increments reference count. |
| IUnknown::Release | Decrements reference count. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2008 [desktop apps only] |
| Header |
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| IDL |
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