IoStartTimer function (ntifs.h)

Article
02/22/2024

The IoStartTimer routine enables the timer associated with a given device object so the driver-supplied IoTimer routine is called once per second.

Syntax

void IoStartTimer(
  [in] PDEVICE_OBJECT DeviceObject
);

Parameters

[in] DeviceObject

Pointer to a device object whose timer routine is to be called.

Return value

None

Remarks

The driver must already have set up the IoTimer routine for the DeviceObject by calling IoInitializeTimer.

Requirements

Requirement	Value
Minimum supported client	Windows 2000
Target Platform	Windows
Header	ntifs.h (include Wdm.h, Ntddk.h, Ntifs.h)
Library	NtosKrnl.lib
DLL	NtosKrnl.exe
IRQL	<= DISPATCH_LEVEL