Blitz Basic Coding Tips - System
System Tips
Adding Version support to your programs

Use the following code fragment near the start of your program.
Goto SkipVer
  Even
  DC.b "$VER ProgName xx.xx (dd.mm.yy)"
  Even
SkipVer:
progName should the base name of your program, containing no spaces. 
xx.xx should be the version number, and dd.mm.yy should be the release date.


Executing external programs from within a Blitz program

see the Execute_ command.  Its syntax is:
Execute_ com$,Input_,OutPut_
Execute_ com$,0,0
the first one will direct input and output to a CLI, which MUST be open.
The second will direct i/o to NIL:.  
To run something asyncronously, use a command line like 
"Run Amigaguide VW.guide".

How to achieve more accurate timing
se the VPos command.  This indicates the beams position on the screen, 
and gives a resolution 1/256 per vertical blank, or 1/(50*256) per second.


Getting rid of the title bar on an OS screen
you need to use OpenScreenTags using the tags 
#SA_Quiet=True and #SA_ShowTitle=False.  
You will also need to use the command MenusOff after opening the screen.

Amiga Mode Hardware Scrolling
Provided by Josh Farley
insert use this code after opening your screen:
 *s0.Screen=Peek.l(Addr Screen(0))
 *v0.ViewPort=*s0\_ViewPort
 *r0.RasInfo=*v0\RasInfo
Now, use the following code in your main loop:
 *r0\_BitMap=Addr BitMap(cb),x,y
 ScrollVPort_ *v0
 cb=1-cb
Where cb= the current bitmap number (for double buffering), x = the x offset within that bitmap, and y = the y offset within that bitmap.

Brought to you by the Blitz Basic Information Centre, courtesy of 
Sergeant Bilko!