IPnpCallback::OnQueryRemove method

[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]

The OnQueryRemove method notifies a driver before a device is removed from a computer.

Syntax


HRESULT OnQueryRemove(
  [in] IWDFDevice *pWdfDevice
);

Parameters

pWdfDevice [in]

A pointer to the IWDFDevice interface for the device object of the device that will be removed.

Return value

If the driver determines that the device can be stopped and removed, the OnQueryRemove callback method must return S_OK or another status code for which SUCCEEDED(status) equals TRUE. Otherwise, it must return a status code for which SUCCEEDED(status) equals FALSE. HRESULT error codes are defined in Winerror.h. Do not return HRESULT_FROM_NT(STATUS_NOT_SUPPORTED).

This method must use the HRESULT_FROM_NT macro to return a specific HRESULT value to return status to a kernel-mode client. For more information, see Supporting Kernel-mode Clients.

Remarks

A driver registers the IPnpCallback interface when it calls the IWDFDriver::CreateDevice method to create a device object.

The framework does not synchronize the OnQueryRemove callback function with other PnP and power management callback functions.

For more information about the OnQueryRemove callback method, see A User Unplugs a Device.

Requirements

Header

Wudfddi.h (include Wudfddi.h)

See also

IPnpCallback
IWDFDevice
IWDFDriver::CreateDevice

 

 

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