Size of memory pointed to by void * pointer.

[VC Maniac]

How to get the size of memory pointed by void * pointer? Thanks in advance!

[Naveen]

Generally there is no way that will work on all conditions. How ever if you are sure that, the pointer will be pointing to a memory allocated using new operator, you can use the _msize function.

nave [OpenedFileFinder] [My Blog]

[Jijo Raj]

You could use _msize()[^]. For instance,

#include "malloc.h"

...

// Allocate 100 bytes.
void* pPointer = new BYTE[100];

// Get the size from void ptr. Remember, It will return size in bytes.
int size = _msize( Ptr );

Please note that it won't work if the memory is allocated in stack. Only for memory allocated on heap. Hope it helps. Regards, Jijo.

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[VC Maniac]

Thank You. Now how do I write any structure to a xml node? Any idea? Thanks in advance!

[Jijo Raj]

Ah! Now i got the context about what you're trying to do. Export the BITMAP to XML? Bravo! i'd say. ;) IMHO, Instead of dumping the BITMAP structure to XML, just get the bitmap data by calling GetBitmapBits()[^] and other necessary information such as width, height, color depth and save that to XML file. Later on by loading these values, you can recreate the bitmap by calling the function - CreateBitmap()[^]. Hope this helps you. Regards, Jijo.

_____________________________________________________ http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

[VC Maniac]

yo buddy.. that will surely help. :-D Thanks!