Need advice on setting Call Library Function Parameters

[MarkGreally]

Hi All.

I am trying to configure a call library function with the following parameters from MSDN

BOOL WINAPI GetConsoleScreenBufferInfo(
  _In_  HANDLE                      hConsoleOutput,
  _Out_ PCONSOLE_SCREEN_BUFFER_INFO lpConsoleScreenBufferInfo
);

For the types HANDLE and PCONSOLE_SCREEN_BUFFER_INFO what should they be set to. These are C++ parameters and there is no documentation of how to use them in Labview. Does anyone know how to set them up??

Thanks.

[mtwar]

Hello

Usually for handle type you need to use i32 and for Screen_buffer_info I would guess string. Try it and let me know whether it works 🙂

Marcin

[MarkGreally]

No that hasn't worked. When I create both the input and the output it creates an in and an out for each. Should there be just one input and one output?

[mtwar]

I'm not sure but I think it's expected behaviour because the function just needs the refernece for the out parameter. Do you have some error right now or just the behaviour is different than expected?

[MarkGreally]

The error code is 1517. Call Library Function Node

[mtwar]

Can you send some code of your application?

[MarkGreally]

The vi is attached. i run a cmd window in the background and then run the vi hoping to get the data from the cmd window.

[mtwar]

Sorry I missed the VI.

You cannot pass 0 to the handle because it doesn't mean anything. You have to know the handle to the console and I am not sure how to get the handle to the already open cmd window.

Can you maybe call the cmd window directly from LabVIEW? Then I suppose getting handle to it would be easy.

[MarkGreally]

In this vi I have called the command window and implement a keypress. is it possible to get the handle from this?

[mtwar]

Try to use this function:

https://msdn.microsoft.com/en-us/library/windows/desktop/ms683231(v=vs.85).aspx

You want to get handle STD_OUTPUT_HANDLE.