Using CWKnob activeX control

[yc]

Why can't I select a 3D style in the "Style" Tab of the property sheet of the CWKnob control?

[bilalD]

I'm not having this problem. Im using version 7.1 of the CWKnob control with CVI 7.1. Are you getting an error message what you select the 3D styles?

[yc]

Well, i'm going to describe more precisely what i'm doing :
I add the ActiveX control CWKnob directly in a panel. By default, "3D Knob" style is selected. When I click (in the "Style" Tab), for example, on the next one ("3D dial" style), nothing happens. This behaviour happens when I want to select any "3D style" but not when I want to select a "classic style". No error message is displayed.
I've also tried to change the style of the control, at the beginning of my program, by the following sequence :
StatusI = GetObjHandleFromActiveXCtrl (panelHandle, PANEL_CWKNOB, &KnobH);
StatusI = CWUIControlsLib__DCWKnobSetBuiltinStyle (KnobH, NULL, CWUIControlsLibConst_cwKnobStyle3DDial);
CA_DiscardObjHandle (KnobH);
and i've always the message "can't access item" in the ERRORINFO structure.

[bilalD]

What is the version of CWKnob you are using? And which version of Measurement Studio do you have installed?
Is there a reason why you are not using the native CVI knob control? It's probably alot easier to use in CVI than the activex control.
This might occur if you have a current version of the activex control install but an older license. If you have a only version of the license, it locks down certain features that were made available in versions after that. I believe 3D styles were not available in some of the older versions (3.0) of the CW user interface controls. You should not have this problem if you have a newer version of Measurement Studio.

If you have Measurement Studio 7.x installed and you are still having this problem, try using the license fixer utility mentioned in this document

[yc]

I had to reinstall Measurement studio and now it's OK. Thanks.