Hi,
I am creating a Window Service in C-Sharp. The Window Service has a
reference to an OCX file created in VC++. In OnStart method I have created
an instance of the class, of the OCX file and called a method of the class.
Compilation was successful.
I created a Windows installer setup(.MSI), for installing the service. The
installation was successful. I started my service from the Services
Management Console. It started and stopped immediately, throwing the below
Exception in the System Application Log:
_______________ _______________ _______________ __________
Service cannot be started. System.Runtime. InteropServices .COMException
(0x8000FFFF): Catastrophic failure
at System.RuntimeT ype.ForwardCall ToInvokeMember( String memberName,
BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData&
msgData)
at FOCCLib.FOCCCla ss.Connect(Stri ng serverAddr, String port)
at WindowsService1 .Service1.OnSta rt(String[] args)
at System.ServiceP rocess.ServiceB ase.ServiceQueu edMainCallback( Object
state)
_______________ _______________ _______________ __________
Please help me in resolving this issue.
Thanks in advance,
Jeevan 1 2010
"Jeevan" <jn******@annet site.com> wrote in message
news:%2******** ********@TK2MSF TNGP15.phx.gbl. .. Hi,
I am creating a Window Service in C-Sharp. The Window Service has a reference to an OCX file created in VC++. In OnStart method I have created an instance of the class, of the OCX file and called a method of the class. Compilation was successful.
I created a Windows installer setup(.MSI), for installing the service. The installation was successful. I started my service from the Services Management Console. It started and stopped immediately, throwing the below Exception in the System Application Log: _______________ _______________ _______________ __________ Service cannot be started. System.Runtime. InteropServices .COMException (0x8000FFFF): Catastrophic failure at System.RuntimeT ype.ForwardCall ToInvokeMember( String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData) at FOCCLib.FOCCCla ss.Connect(Stri ng serverAddr, String port) at WindowsService1 .Service1.OnSta rt(String[] args) at System.ServiceP rocess.ServiceB ase.ServiceQueu edMainCallback( Object state) _______________ _______________ _______________ __________
Please help me in resolving this issue.
Thanks in advance, Jeevan
OCX objects have special requirements not fullfilled when instantiated from
Windows Services.
1. They need an STA apartment to live in, Windows Services threads are MTA
by default.
2. They need a ActiveX container as a host - for instance a Windows Form,
Windows Services don't/shouldn't provide such container as they should be
designed to run without a UI.
Or simply stated, don't try to use OCX's in non interactive applications.
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