IPB_Arguments interface

Description

The IPB_Arguments and IPB_Value interfaces are used to pass values between the PowerBuilder VM and PowerBuilder extension modules. Each argument is represented by a pointer to the IPB_Value interface.

Methods

Description

Returns a pointer to the IPB_Value interface representing an argument whose order in the list of arguments is indicated by a specified index.

Syntax

GetAt ( pbint index )

Returns

IPB_Value*.

Examples

Example 1

In the following code fragment, GetAt obtains the first value in the PBCallInfo structure. The value has been passed in from the calling function.

PBCallInfo ci;
LPCSTR myPBNIObj = NULL;
IPB_Value* pArg0 = ci->pArgs->GetAt(0);
if (!pArg0->IsNull())
{
   pbstring t = pArg0->GetString();
   if (t != NULL)
      myPBNIObj = session->GetString(t);
}

See also

Description

Obtains the number of arguments in an instance of PBCallInfo.

Syntax

GetCount ( )

Returns

pbint.

Examples

Example 1

This example uses GetCount in a FOR loop used to process different argument types:

int i;
for (i=0; i < ci-> pArgs -> GetCount();i++)
{
   pbuint ArgsType;

   if( ci -> pArgs -> GetAt(i) -> IsArray())
   
      pArguments[i].array_val = 
         ci -> pArgs -> GetAt(i) -> GetArray();
      continue;
   }

   if( ci -> pArgs -> GetAt(i) -> IsObject()) 
   {
      if (ci -> pArgs -> GetAt(i) -> IsNull()) 
         pArguments[i].obj_val=0;
      else
         pArguments[i].obj_val = 
            ci -> pArgs -> GetAt(i) -> GetObject();
      continue;
   }
   ...

See also