I want to Create A 16bit Bitmap dynamically, here is how im currently doing it


CFbsBitmap *iBmp = new CFbsBitmap;
TSize iSz(160,120);

iBmp->Create(iSz,EColor64K); // 16bit
TUint8 *pData = (TUint8*)iBmp->DataAddress();

// .... update data address here

TInt nRet = iBmp->Save(_L("c:\test.mbm"));
// nRet value is -21 Access Denied

WindowGc gc = SystemGC();
TRect rc = Rect();
gc.BitBlt(rc.iTl,iBmp); // Does not display bmp on screen

// do clean up

I keep getting -21 when calling Save() function, any ideas why?
Plus BitBlt doesn't seem to work.
Is there something im doing wrong?
Is there a documentation on Native Bitmap Format for Symbian? Is is the same as the MBM format?

Thank