IMAQdxGrabCW

Format

IMAQdxGrabCW(id As IMAQdxSession, image As CWIMAQImage, waitForNextBuffer As Long, actualBufferNumber As Long) As IMAQdxError

Purpose

Acquires the most current frame into image. Call this function only after calling IMAQdxConfigureGrab. If the image type does not match the video format of the camera, this function changes the image type to a suitable format.

Parameters

Parameter	Type	Description
id	IMAQdxSession	A valid Session ID, which you can obtain using IMAQdxOpenCamera.
image	CWIMAQImage	The image that receives the captured pixel data.
waitForNextBuffer	Long	If the waitForNextBuffer value is true, the driver will wait for the next available buffer. If the waitForNextBuffer value is false, the driver will not wait for the next available buffer, and will instead return the last acquired buffer.
actualBufferNumber	Long (passed by reference)	On return, the actual cumulative buffer number of the image retrieved.

Return Value

On success, this function returns IMAQdxErrorSuccess. On failure, this function returns an error code. You can obtain a more detailed error message with IMAQdxGetErrorStringCW.