Ok, here you are:
This excerpt is from graphics.mmp, part of Graphics example in 1st and 2nd edition S60 SDK-s. 3rd edition is a bit different (Graphics example is re-included in FP1, but it is not part of 3rd ed noFP and MR).
START BITMAP images.mbm
SOURCE c12 image1.bmp
SOURCE c12 image2.bmp
SOURCE 1 image2_mask.bmp
Then you need #include <images.mbg> and CFbsBitmap::Load or CEikonEnv::CreateBitmapL.
The same example uses the latter:
iBackgroundImage = iEikonEnv->CreateBitmapL( KMultiBitmapFilename,EMbmImagesImage1 );
iSpriteImage = iEikonEnv->CreateBitmapL( KMultiBitmapFilename,EMbmImagesImage2 );
iSpriteMask = iEikonEnv->CreateBitmapL( KMultiBitmapFilename,EMbmImagesImage2_mask );