Modifying sequence variables from Labwindows User Interface

Hi,
What is the correct procedure for modifying sequence variables from a
LabWindows CVI user interface.
I am currently using an enhanced version of the simple interface that is
shipped with TestStand.
I have tried SetValVariant etc. with a ref to the engine and this didn't
work for me.
Should I first be passing the sequence context via PostUIMessageEx ?
Thanks in advance,
Bill
Solved!
Go to Solution.

Hey Bill,
Yeah, I forget that this process is a little bit more straightforward in LabVIEW then it is in CVI (just one type cast is necessary). Here are the steps (and variables) to make it a usable SequenceContext object:
LPUNKNOWN tempActiveXRef;
VARIANT tempTSSeqContext;
CAObjHandle TSSeqContext;
     //Get ActiveX object from UIMessage
   tsErrChk(TS_UIMessageGetActiveXData (uiMsg, NULL, &tempActiveXRef));
     //Convert LPUNKNOWN to Variant
   tempTSSeqContext = CA_VariantIUnknown (tempActiveXRef);
     //Convert variant to object handle
   CA_VariantConvertToType (&tempTSSeqContext, CAVT_OBJHANDLE, &TSSeqContext);
tsErrChk(TS_PropertySetValString(TSSeqContext, &ErrorInfo, "MyLookup.String", 0, "Testing"))
I haven't tested this exact code, but I modified some code that I know works for the purpose of demonstration. Like I said, I wish there was a way to just type cast straight to the Object Handle, but since you are getting an LPUNKNOWN object, you have to first go the variant. Have a good one.
Adam

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The general idea is the following:
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Check status.vi ‏17 KB
FrontEndCallbacks.seq ‏5 KB

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Go to Solution.

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Solved!
Go to Solution.

Hi,
first thing, why have you posted this query twice, http://forums.ni.com/t5/NI-TestStand/Update-Station-Globals-from-CVI-UI/m-p/1317023
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Modifying sequence variables from Labwindows User Interface

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