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EngLockDriverObj function (winddi.h)

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The EngLockDriverObj function creates an exclusive lock on this object for the calling thread.

Syntax

ENGAPI DRIVEROBJ * EngLockDriverObj(
  HDRVOBJ hdo
);

Parameters

hdo

Handle to the DRIVEROBJ structure to be locked by GDI.

Return value

EngLockDriverObj returns a DRIVEROBJ structure if the function is successful. If the operation fails, it returns NULL.

Remarks

This function will fail if the handle is invalid, if the object is already locked by another thread, or if the handle is not owned by the calling process.

Requirements

Requirement Value
Minimum supported client Available in Windows 2000 and later versions of the Windows operating systems.
Target Platform Universal
Header winddi.h (include Winddi.h)
Library Win32k.lib
DLL Win32k.sys

See also

DRIVEROBJ