LabVIEW
CreateEvent() returns 0
Solved!
Hello everyone,
I am using this code to call CreateEvent function:
It works fine, but not always. When I run for the first time, it returns correct, nonzero value. But when I call it second time, the return value is 0. Then, calling it for the third time will result in returning nonzero, and 4th - zero again etc.
Using CloseHandle() function between calls doesn't help.
Hi turbolek,
please stick with one thread for this topic!
As long as you only post images nobody is able to help you! We don't know which functions you are calling nor do we know the settings you made in the CLFN!
@turbolek wrote:
Sorry, you're right. I didn't want to post all huge code, so thought that images will be the best solution, but now I've created new VI, including just the part I am talking about.
So, in attached VI there's the same issue than described before - 2nd, 4th, etc. run results in returning 0.
He's also right that you should stick to one thread.
Hi turbolek,
I don't know how to merge this topics or delete one of them.
You cannot merge or delete threads, this is only upto the forum admins. You can use links in your messages to indicate a discussion was continued in a different thread (as I already have done in your other thread.)
Did you read the MSDN entry on CreateEventA()? It says:
If the function fails, the return value is NULL. To get extended error information, call GetLastError.
You're not calling the function correctly.
Use unsigned-32-bit values for first and fourth inputs, and unsigned bytes (8-bit) values for the second and third inputs. Nothing by pointer.
When you correct for this, it works every time
