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Resolved oleobject problems using

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  1. Andrew Davis
    Andrew Davis
  2. PowerBuilder
  3. Monday, 15 January 2018 16:05 PM UTC

Hi Can anyone help

I have a oleobject dll that I need to accesS - I have the following code

 

OLEObject  objDEPHandler
string strError
long numResultCode
integer li_port,li_ret
 
li_port=1
 
objDEPHandler = create OLEObject
 
if objDEPHandler.connecttonewobject("MPITengineLite.DEPHandler")<0 then
messagebox("DEPHandler","Cant create MPITengineLite.DEPHandler")
destroy objDEPHandler
RETURN
end if
 
objDEPHandler.deviceid=1
 
objDEPHandler.open(li_port) // it crashes here saying error calling external function open
 
// this is the definition
 

Open

method Open

Syntax:

Open(ComPort)

Parameters:

Data Type

Name

Direction

Necessity

(I2)

ComPort

[IN]

required

Return:

(EMPTY)

regards

 

Andrew

  1. Function
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Accepted Answer
Andrew Davis
Andrew Davis Accepted Answer Pending Moderation
  1. Tuesday, 16 January 2018 07:43 AM UTC
  2. PowerBuilder
  3. # Permalink

Hi all

I have found the problem - i added a ref in the open(ref li_port) and it all works now 

thank your for your suggestions - I will add the try catch - this may help in the futur

regards

Andrew

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Responses (3)
Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Monday, 15 January 2018 20:08 PM UTC
  2. PowerBuilder
  3. # 1

Hi Andrew;

   My suggestion would be to first wrap the PowerScript code that deals with the OLE interaction inside a TRY..CATCH block. The nice thing about that approach is that when the OLE/OCX interaction fails, the Exception object often contains more detailed information about the exact failure.

Food for thought.

Regards ... Chris

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Chris Harmon
Chris Harmon Accepted Answer Pending Moderation
  1. Monday, 15 January 2018 23:57 PM UTC
  2. PowerBuilder
  3. # 2

Besides the try and catch you could create a custom oleobject. Then you could see more extended error information in the error events either through the debugger or placing code in the events.

Chris

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