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CvInvokeWaitKey Method
http://www.emgu.com
Waits for key event infinitely (delay <= 0) or for "delay" milliseconds.

Namespace: Emgu.CV
Assembly: Emgu.CV.World (in Emgu.CV.World.dll) Version: 3.2.0.2682 (3.2.0.2682)
Syntax
public static int WaitKey(
	int delay = 0
)

Parameters

delay (Optional)
Type: SystemInt32
Delay in milliseconds.

Return Value

Type: Int32
The code of the pressed key or -1 if no key were pressed until the specified timeout has elapsed
See Also