Connecting to a COM server
To access a method associated with a component in the COM
server, the PowerBuilder client connects to the component using
its programmatic identifier (ProgID) or its class identifier (CLSID).
You can use a tool such as OLEVIEW or the OLE tab in the PowerBuilder Browser
to view the Program ID or CLSID and methods of registered PowerBuilder
COM objects.
To establish a connection to the COM server, you need to execute
the PowerScript statements required to perform these operations:
- Declare a variable of type
OLEObject and use the Create statement to instantiate
it. - Connect to the object using its Program ID or CLSID.
- Check that the connection was established.
Example The following script instantiates the EmpObj OLEObject
object, connects to the PowerBuilder COM object PBcom.Employee,
and checks for errors:
|
1 |
OLEObject EmpObj<br />Integer li_rc<br />EmpObj = CREATE OLEObject<br />li_rc = EmpObj.ConnectToNewObject("PBcom.employee")<br />IF li_rc < 0 THEN<br /> DESTROY EmpObj<br />MessageBox("Connecting to COM Object Failed", &<br /> "Error: " + String(li_rc))<br />Return<br />END IF |
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