hello

[zfq]

I need to know exactly how to handle optional parameters(VARIANT) in client's call function.
Thank you.

 

[danceman]

That can be a big question. Is there any documentation?

Generaly a default parameter is passed over by leaving it blank.

function with three parameters and they are all optional

functionName()
functionName(,param2,)
functionName(param1,param2,)
functionName(,,param3)

sometimes they require the correct datatype but empty

functionName(0,"",0)
functionName(0,0,0)

what you pass depends on what the parameters types are. Attitude is Everything

 

[zfq]

the optional parameter is VARIANT type.
I have checked MSDN and done as what it said.
*****************************************
VARIANT vOpt;
vOpt.vt=VT_ERROR;
vOpt.scode=(a constant, I cannot remember now);
******************************************
But, there is still a error when I run the call.
The error is "member is not found"

 

[danceman]

Is this an ActiveX object? Can you give me more detail on how you are setting up the use of this function in FoxPro. FoxPro does not have VATIANT data types and it looks like you are addressing a structure. Attitude is Everything

 

[danceman]

Are you using MSMQ? If so what version of Visual Studio and service pack. There is a bug in MSMQ that was fix in service pack 3. Attitude is Everything

 

[zfq]

no, I am using VC++ 6 to construct a client function,
and call the server ( objects in Solidworks).
Thank you.