9 Optional Click Stop and Close to end the operation (Page 13 / 14) User Manual of MVC SDK Demo (VB)

User Manual of Machine Vision Camera SDK Demo (VB)

9. (Optional) Click Stop and Close to end the operation.

Note: If exception or error occurred during the procedure, the prompt dialog will pop up.

6.3 Programming Guideline

6.3.1 Multiple Cameras

Based on the BasicDemo, the MultipleDemo added a member variable m_bEnabled array in the class. This

variable is used to enable four cameras, and the m_bEnabled status (True or False) is determined by the used

device number and opened device number when initializing. The following basic operations (do or not) of

corresponding cameras are also determined by m_bEnabled.

6.3.2 Total/Lost Frame Number and Picture Storage

The total frame number (member variable) is calculated in the callback function.

Get the lost frame number by calling API MV_GIGE_GetNetTransInfo_NET(ByRef pstInfo As

MyCamera.MV_NETTRANS_INFO).

The update period of total frame and lost frame is 1 second. Set the timer and get the lost frame number per

second, and then update the total frame number and lost frame number.

The callback function can also save the pictures and check whether to save the current frame as picture via

the click of Save Picture button. After saving the picture, edit the flag bit to avoid saving picture repeatedly.