CWMachineVision.SetupViewerForLineSelection.

[kikou]

Hi
I want to programmaticalyset the ROI of a CWIMAQViewer.

When i use CWMachineVision.SetupViewerForLineSelection(CWIMAQViewer) i have an exception thrown.

Exception : Impossible to CAST a  AxCWIMAQViewer to CWIMAQViewer

Thanks for your help

[A_Person]

Your function should be CWMachineVision.SetupViewerForLineSelection(CWIMAQViewer.GetCWIMAQViewer()).  That will get your viewer in the correct format.

[kikou]

Hi
Thanks for the response i will try...
Wh do we have 2 type AxcWimaqViewer which is the Active X object and the Type CWImaqViewer which is i suppose the handle of the AxCwimaqViewer

[gregstoll]

kikou -

This is a limitation of the current .NET API, which was directly converted from Visual Basic 6.  In our upcoming release, we will have a native .NET API that should avoid many of these confusing issues.

Greg Stoll

Vision R&D

National Instruments