Getting CreateFile handle in managed code

  • Thread starter Thread starter Steve N.
  • Start date Start date
S

Steve N.

I'm having trouble getting a handle returned from the following code
within a managed class:

HANDLE m_hSerialComm = CreateFile("\\\\.\\COM1\0\0\0",
GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING,
FILE_FLAG_NO_BUFFERING, 0);

It works fine in non-managed code but I get a '{void}' returned when run
within managed code. I'm wondering if that's actually the problem or if
there is something else I'm missing... If it is the problem, then what's
the best solution?

Thanks
Steve
 
Steve,
I'm having trouble getting a handle returned from the following code
within a managed class:

HANDLE m_hSerialComm = CreateFile("\\\\.\\COM1\0\0\0",
GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING,
FILE_FLAG_NO_BUFFERING, 0);

It works fine in non-managed code but I get a '{void}' returned when run
within managed code. I'm wondering if that's actually the problem or if
there is something else I'm missing... If it is the problem, then what's
the best solution?
Click to expand...

There shouldn't be a problem. I believe what you're seeing is that when
working in the mixed mode debugger it has "issues" displaying the values of
certain things (like handle values, which are just void* in essence).
 
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