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Yes, the pointer will remain valid. They are basically just numbers.

Do you mean the pointer itself or the allocated memory block it references will remain valid?

In this code I am initialising a memory pointer and a pointer to a structure in a sub function for use outside the sub function. It compiles and works, but is it safe - i.e. will the pointers always stay valid outside the sub function?

I was particularly surprised that ReAllocateMemory() accepts a ...

Thanks again for your time, Demivec. I'm sure this info will be helpful to others too.

Demivec, this is incredibly helpful. Thank you for taking the time to post this.

I think my initial misunderstanding stems from the fact that in PB, "*" is not treated as an indirection operator as it is in C. Because, if it is, then @*MemPtr makes no sense as you would be dereferencing the pointer ...

Where should I be looking (in available documentation) to find this information, please?
Have you tried opening Tools-Structure Viewer[Alt+s]?


Thanks, yes - I see the built-in structures there which is great - now I know I need to use one to pass a pointer by reference to a procedure.

But ...

You can't have a pointer to a stack-allocated type, because for some reason even though C can do it PB refuses. So, in order to have a pointer to an integer, long, etc., you have to use those structures you found. Don't feel bad, this is woefully confusing and rather annoying, I wish PB would just ...

I just want to understand how I have managed to misunderstand this fundamental concept! I have been using PB for some time and this is the first time I've run into this.

It seems to me that there is nothing in the PB help or online docs that indicates that a pointer can't simply be passed by ...

Thanks for your replies.

In your example, mk-soft, you are assigning the .integer structure to the pointer - something that I wasn't even aware was possible.

I thought it was only possible to assign the built-in data types to a variable using the single-letter suffix (e.g. myvar.i) but of course ...

Hello, I think you can use Result = AvailableSerialPortOutput(#SerialPort) to find out how many bytes remain in the serial output buffer.

A slightly better approach would be to use handshaking (either hardware or software) assuming that the old computer can support either.

Using 6.20 x64

Passing a pointer to an allocated memory block to a sub function which reallocates that memory block to a larger size fails when the memory pointer is passed directly as a parameter. The pointer becomes invalid with error "the specified 'MemoryID' is not valid".

This however ...

No, I wouldn't expect this behavior from windows, but I would expect it from badly/incorrectly written programs. No offense.

Thanks for your reply, and no offence taken. Without knowing for sure the cause, I cannot rule this out myself, hence my question.

I would provide example code, but ...

My GUI application works with SCSI devices using SCSI passthrough (SPTI) in non-overlapped mode, i.e. the call looks like this:

; Make the call
lResult=DeviceIoControl_(*SCSI\hDevice, ; handle to the SPTI device
#IOCTL_SCSI_PASS_THROUGH_DIRECT, ; [in] dwControlCode
*SCSI\SPTDWS\SPTD, ; [in ...

Hello all,

I have a collection of PureBasic Windows console mode applications. They are written to exploit "new" console features and although of course will work in legacy console mode, display better out of legacy console mode.

Some of the Windows machines I'm targeting have the legacy console ...

This is great news, thanks kenmo.

I have searched the forum but failed to find an answer to this.

When working on a project with multiple source / include files open as tabs across the top of the IDE window, it is possible to change the order in which the file appear left to right, but is there a way to permanently fix this order ...