VideoPortGetAssociatedDeviceExtension function (video.h)
The VideoPortGetAssociatedDeviceExtension function returns the device extension for the parent of the specified device object.
Syntax
VIDEOPORT_DEPRECATED VIDEOPORT_API PVOID VideoPortGetAssociatedDeviceExtension(
[in] IN PVOID DeviceObject
);
Parameters
[in] DeviceObject
Is the device object of a child device.
Return value
VideoPortGetAssociatedDeviceExtension returns a pointer to the device extension of DeviceObject's parent.
Remarks
The miniport driver of a child device can call this function to obtain a description of its parent through the parent's device extension.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Available in Windows 2000 and later versions of the Windows operating systems. |
Target Platform | Desktop |
Header | video.h (include Video.h) |
Library | Videoprt.lib |
DLL | Videoprt.sys |
IRQL | PASSIVE_LEVEL |