api call to verify an expression

[Aaron Nevarez]

Is there any api call to verify (validate) an expression that I can use in CVI? Similar to the check button on the left side of the textbox when entering an expression.

Thanks for the help.

--Aaron.

[AllenP]

Engine.CheckExpression and Engine.CheckExprSyntax

(in CVI TS_EngineCheckExpression and TS_EngineCheckExprSyntax).

Allen P.

NI

[Antonio Lie]

Aaron,

You can use either:
Engine.CheckExpression
or
Expression.Validate
In CVI you will use the Engine method as follows:

int __declspec(dllexport) __stdcall MyEntryPoint (CAObjHandle context)
{

CAObjHandle                 tsEngine = 0;
char* expression =0;
char * errDesc =0;
long startPos;
long endPos;
VBOOL isValid = VFALSE;
TS_SeqContextGetEngine(context, &errorInfo, &tsEngine);
TS_EngineCheckExpression (tsEngine, &errorInfo, context, expression, &errDesc, &startPos,&endPos, &isValid);
CA_DiscardObjHandle(tsEngine);
CA_FreeMemory(errDesc);
}

Check the TestStand API online help for more information.
Hope it helps.

Antonio.

Message Edited by Antonio Lie (NI) on 10-25-2005 04:28 PM

[Aaron Nevarez]

Thanks a lot guys!

--Aaron.