How can I release the memory allocated by ImageToArray? (ActiveX)

[YF_Jacky]

Using IDE: Borland C++ Builder 6 / BDS 2006

When I write the program with IMAQ ActiveX interface, I meet a problem in using ImageToArray function.

I can get the image data by this way:

Variant imgData;

Byte *pDataBuf;

int iBufSize;

...

imgData=CWIMAQ1->Images->Items(Variant(1))->ImageToArray();

memcpy(pDataBuf,imgData.ArrayLock(),iBufSize);

imgData.ArrayUnlock();

...

The problem is : after I called the codes many times, my program occupys almost all the memory.

So I wanna know: How can I release the memory allocated by ImageToArray ?

I know NI will not support BCB/BDS, but this is an ActiveX question, i think

sorry for my poor english!

[YF_Jacky]

why no one help me?

帖子被YF_Jacky在09-26-2006 01:04 AM时编辑过了

[RyanF]

Hey YF_Jacky,

Have you tried calling "delete imgData"?  Let me know if that works for you.

Regards,

Ryan F.

[YF_Jacky]

thanks

unfortunately, "delete imgData" still can not solve the problem:mansad:

[RyanF]

Hey YF_Jacky,

I can't claim that I'm an expert with Active X and so I'm wondering what you're trying to accomplish with this line:

imgData=CWIMAQ1->Images->Items(Variant(1))->ImageToArray();

The examples I've seen using CWIMAQ1->Images have directly accessed the indexed image needed. Ex:

imgData=CWIMAQ1->Images(0)->ImageToArray();

(I have not tested this code so I'm not sure whether the pointer calls '->' or direct '.' function accessors are needed)

As far as I can tell the variable imgData should be released in memory as soon as it exits the scope of the program (I'm assuming that the imgData you've listed is a global variable).  Have you tried using a local variable for imgData?

Regards,

Ryan F.