Thank you Chris.

I use Temporary memory when allocating offscreen using _tempmembit, however,
I didn't know how to obtain normal memory handle from system heap.

BTW, the problem why I fail creating PICT handle from offscreen is I don't
know how to use temporary memory in ``OPEN PICTURE--CLOSE PICTURE''
statements. There is no need to prepare memory space for PICT handle, and it
automatically use application heap... So, when I tried to capture large
image, sometimes it fails.

It's very easy to solve this problem. Just give more large heap to the
application, but, this is not smart. Because when I want to show only 32 *
32 image, it needs large memory and almost of it is never used.