This is not a sprite tutorial! For a good sprite tutorial online, see the [Visual Basic Explorer Sprite Tutorial.] http://www.vbexplorer.com/VBExplorer/gdi1.asp
This little demo does two things.
It demonstrates some of the complexity involved in drawing sprites. This is a simplified version that takes a shortcut and draws the sprite on the screen, rather than building the frame in memory, but it shows quite a lot of the necessary coding.
Draw Sprites in Any Graphicbox
The demo is highly commented. If you follow the procedures outlined, you can use this method to draw sprites in graphicboxes yourself. This might be helpful because Liberty BASIC permits you to have only one sprite graphicbox or graphics window per program.
'run this program from the LB root directory nomainwin 'load a sprite loadbmp "smile", "sprites\smiley1.bmp" 'get handle of bmp hSprite=hbmp("smile") 'get dimensions of sprite bitmap 'first build a struct to contain info struct BITMAP,_ bmType As Long,_ bmWidth As Long,_ bmHeight As Long,_ bmWidthBytes As Long,_ bmPlanes As Word,_ bmBitsPixel As Word,_ bmBits As Long 'get size of struct nSize=Len(BITMAP.struct) 'fill struct CallDLL #gdi32, "GetObjectA",_ hSprite As Long,_ 'handle of sprite bitmap nSize As Long,_ 'size of struct BITMAP As struct,_ 'struct results As Long 'retrieve info BitmapWidth=BITMAP.bmWidth.struct BitmapHeight=BITMAP.bmHeight.struct SpriteHeight=BitmapHeight/2 ''height of sprite is half bmp height 'load a background loadbmp "bg", "sprites\bg1.bmp" 'open a window that contains a graphicbox WindowWidth=230:WindowHeight=160 graphicbox #1.g, 10,10,200,100 open "Sprite in a Box" for window_nf as #1 #1 "trapclose [quit]" 'draw background: #1.g "down; drawbmp bg 0 0" 'get graphicbox handle hBox=hwnd(#1.g) 'get a device context for graphicbox CallDLL #user32, "GetDC",_ hBox As Long,_ 'handle of graphicbox hDC As Long 'returns handle of device context 'create memory device context CallDLL #gdi32, "CreateCompatibleDC",_ hDC As Long,_ 'graphicbox device context hDCmem As Long 'returns memory device context 'select our sprite bitmap into memory DC CallDLL #gdi32, "SelectObject",_ hDCmem As Long,_ 'memory device context hSprite As Long,_ 'bitmap handle oldObject As Long 'returns previous object of same type x=60 'x location to draw sprite y=40 'y location to draw sprite w=BitmapWidth 'width of sprite h=SpriteHeight 'height of sprite is half bmp height x2=0 'x location to get image from y2=0 'y location to get image from 'draw mask first CallDLL #gdi32, "BitBlt",_ hDC As Long,_ 'graphicbox hDC x As Long,_ 'x location to put sprite y As Long,_ 'y location to put sprite w As Long,_ 'width of sprite h As Long,_ 'height of sprite hDCmem As Long,_ 'memory DC x2 As Long,_ 'x location of source sprite on bmp y2 As Long,_ 'y location of source sprite on bmp _SRCAND As Ulong,_ 'dw Raster Operation for mask RESULT As Boolean 'y location to get sprite from is the 'same as the height of the sprite - 'remember the mask is on the bitmap 'above the sprite! y2=SpriteHeight 'y location to get image from 'now draw sprite: CallDLL #gdi32, "BitBlt",_ hDC As Long,_ 'graphicbox hDC x As Long,_ 'x location to put sprite y As Long,_ 'y location to put sprite w As Long,_ 'width of sprite h As Long,_ 'height of sprite hDCmem As Long,_ 'memory DC x2 As Long,_ 'x location of source sprite on bmp y2 As Long,_ 'y location of source sprite on bmp _SRCPAINT As Ulong,_'dw Raster Operation for sprite RESULT As Boolean 'release device context for graphicbox CallDLL#user32, "ReleaseDC",_ hBox As Long,_ 'handle of graphicbox hDC As Long,_ 'handle of device context result As Long 'delete memory device context CallDLL #gdi32, "DeleteDC",_ hDC As Long,_ 'graphicbox dc r As Boolean 'use this method to make graphics persist #1.g "getbmp SaveMe 0 0 200 100" #1.g "drawbmp SaveMe 0 0; flush" wait [quit] close #1:end