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IWindowProvider.WaitForInputIdle Method

Causes the calling code to block for the specified time or until the associated process enters an idle state, whichever completes first.

Namespace:  System.Windows.Automation.Provider
Assembly:  UIAutomationProvider (in UIAutomationProvider.dll)

bool WaitForInputIdle(
	int milliseconds


Type: System.Int32

The amount of time, in milliseconds, to wait for the associated process to become idle. The maximum is MaxValue.

Return Value

Type: System.Boolean
true if the window has entered the idle state; false if the timeout occurred.


When the parameter passed in is not a valid number.

This method is typically used in conjunction with the handling of a WindowOpenedEvent.

The implementation is dependent on the underlying application framework; therefore this method might return some time after the window is ready for user input. The calling code should not rely on this method to ascertain exactly when the window has become idle.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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