Create a new layer behind all existing layers.
Source position: layers.pas line 96
function CreateBehindLayer(  | 
Li: PLayer_Info;  | 
Bm: PBitMap;  | 
X0: LongInt;  | 
Y0: LongInt;  | 
X1: LongInt;  | 
Y1: LongInt;  | 
Flags: LongInt;  | 
Bm2: PBitMap  | 
):PLayer;  | 
Li  | 
  | 
pointer to LayerInfo structure  | 
Bm  | 
  | 
pointer to common BitMap used by all Layers  | 
X0  | 
  | 
left corner of layer  | 
Y0  | 
  | 
upper corner of layer  | 
X1  | 
  | 
right corner of layer  | 
Y1  | 
  | 
lower corner of layer  | 
Flags  | 
  | 
various types of layers supported as bit sets. Flags: LAYER*  | 
Bm2  | 
  | 
pointer to optional Super BitMap  | 
pointer to Layer structure if successful nil if not successful
Create a new Layer of position and size (x0,y0)->(x1,y1) Make this layer of type found in flags. If SuperBitMap, use bm2 as pointer to real SuperBitMap, and copy contents of Superbitmap into display layer. If this layer is a backdrop layer then place it behind all other layers including other backdrop layers. If this is not a backdrop layer then place it behind all nonbackdrop layers.
Attention
When using bm2 SuperBitmap, you should also set LAYERSMART flag.