Can someone get FileSelectPopuEx and WMI calls to CoInitializeEx / CoInitializeSecurity to coexist in the same code?
I'm having a problem to run the attached code, which in an ideal world, would allow me to access the hard disk on the host PC serial numbers and use the FileSelectPopupEx function in any order.
It seems that as soon as I launch FileSelectPopupEx (even by cancelling) the disc code stops working. There will be mistakes retrun to CoInitializeEx run from the same thread or CoInitializeSecurity run from separate threads.
Based on aid for the 3 functions, it's probably that the error is caused by the mode of apartment for pieces of code. With WMI needing an MTA and the FileSelectpopupEx that need to be threaded in a single compartment. The FileSelectPopupEx suggests executes in a separate thread to avoid conflicts. I tried this, and unless I have that messed up, separate threads did not fix the problem.
Since I never plan on the implementation of these components at the same time, it would be quite 'Cancel initialization' environment variables set FileSelectPopupEx after each instance in my case. Unfortunately, I'm at a bit of a loss on the bits to switch.
Regarding the attached code, I tried to run in the two CVI2012 SP1 (32-bit and 64-bit) and CVI2013 (SP1 (32-bit and 64-bit) with identical results. If you want to re-create the link of a few questions for the following static libraries from lib SDK for CVI: ole32.lib, propsys.lib, Ole32.lib and WbemUuid.lib.
I discovered that the code 'error' in this case was just a warning that was already called CoinitializeSecurity. The code is equal to RPC_E_TOO_LATE and can be swallowed with the following slight change to the code provided.
If (FAILED (hr) &!) (HR) IS RPC_E_TOO_LATE))
Sorry for the bug world.
Tags: NI Software
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