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ActiveX parameter by reference
| ActiveX parameter by reference [message #40222] |
Mon, 26 July 2004 13:31 |
b_gom
Messages: 105
Registered: April 2003
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Senior Member |
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I'm having trouble with calling an ActiveX method that expects a
parameter to be passed by reference. All other methods in the object
work properly, but I get a type mismatch error when trying to pass a
parameter by reference.
here is the interface description for the object from the OLE/COM
object viewer:
---------------------------------------
dispinterface _DA32Control {
properties:
...
methods:
...
[id(0x00000018)]
long GetAliveMask(long* pdwAliveMask);
...
};
---------------------------------------
In IDL, when I try calling the method by passing an existing long
variable as a parameter, I get this error:
mask = 1L
result = A32Control -> GetAliveMask(mask)
returns:
%
IDLCOMACTIVEX$CLSID$A4E2DC53_1A67_11D6_A2CE_0001022E1B44::GE TALIVEMASK:
Unable to call method GETALIVEMASK. Error with parameter 1.
Type mismatch.
I've also tried all other data types, as well as defining 'mask' as a
single element array and as a pointer:
Mask=0L
Pmask=ptr_new(mask)
result = A32Control -> GetAliveMask(pmask)
returns:
%
IDLCOMACTIVEX$CLSID$A4E2DC53_1A67_11D6_A2CE_0001022E1B44::GE TALIVEMASK:
Pointer expression not allowed in this context: PMASK.
What do I pass to the IDLcomIDispatch object to satisfy the expected
long* type?
Thanks
Brad Gom
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