Kbase P114749: Cannot expand treeview nodes in OPCServerBrowser OCX in OpenEdge 10
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
15/06/2006 |
|
Status: Unverified
FACT(s) (Environment):
OpenEdge 10.0x
OpenEdge 10.1A
Windows
SYMPTOM(s):
Using OPCServerBrowser ActiveX control from Software Toolbox
OPCServerBrowser ActiveX contains a treeview
Nodes of the treeview will not expand
No error message are raised
SelChanged (Selection Changed) event of the ActiveX control does not fire when the selected node changes
ActiveX control works properly in Progress 9.1x
ActiveX control works properly in Visual Basic 6
CHANGE:
Upgraded to OpenEdge 10
CAUSE:
Development has researched the issue and found that whilst the code involved in handling the mouse-click event had not changed between 9.1E and 10.1A, the client is compiled with "UNICODE" defined starting in version 10. Due to this, all interaction between Progress and the native Windows and C-runtime routines is done using UNICODE strings. This causes the Progress application to use different versions of all the Windows routines, for example CreateWindowW instead of CreateWindowA. However, it still looks like the Progress client is operating correctly. All of the Window's events are passed on to the control as they should be and this can be seen from debugging the code using MS Spy++. As such, it may be that the problem was in the ActiveX control itself; a newer version of the control supplied by Software Toolbox did not have the issue.
FIX:
Contact Software Toolbox support to obtain a new version of the OPCServerBrowser ActiveX control. This is freely available to current OPCServerBrowser OCX license holders.