directdraw blitting problem~!

[raoul85]

I set my display mode in direct draw to:
dd.SetDisplayMode 1024, 768, 32, 0, DDSDM_DEFAULT

But when I blit, there are weird pictures or "sprite trails" showing up in parts of the screen, but this does not happen if I set it to 16-bit, then again I dont want to use 16 bit, so anyone know how to fix this problem?
thanx........

[Machaira]

Without seeing exactly what you're doing there's not much we can do to help you.

[raoul85]

ok........................

this is the code for the game for now....when I display my image, I have weird pictures or "sprite trails" while in 32 bit for display mode. But Works fine in 16 bit. Problem?
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Public Sub Init()
Set dd = dx.DirectDrawCreate("")
dd.SetCooperativeLevel Me.hWnd, DDSCL_FULLSCREEN Or DDSCL_EXCLUSIVE Or DDSCL_ALLOWREBOOT
dd.SetDisplayMode 1024, 768, 32, 0, DDSDM_DEFAULT

Dim dsPrimary As DDSURFACEDESC2
Dim caps As DDSCAPS2
dsPrimary.lFlags = DDSD_CAPS Or DDSD_BACKBUFFERCOUNT
dsPrimary.ddscaps.lCaps = DDSCAPS_COMPLEX Or DDSCAPS_FLIP Or DDSCAPS_PRIMARYSURFACE
dsPrimary.lBackBufferCount = 1
Set Primary = dd.CreateSurface(dsPrimary)


caps.lCaps = DDSCAPS_BACKBUFFER
Set BackBuffer = Primary.GetAttachedSurface(caps)

Dim dssprite As DDSURFACEDESC2
dssprite.lFlags = DDSD_CAPS Or DDSD_WIDTH Or DDSD_HEIGHT
dssprite.ddscaps.lCaps = DDSCAPS_OFFSCREENPLAIN
dssprite.lWidth = 200
dssprite.lHeight = 200
Set sprite = dd.CreateSurfaceFromFile("c:\Documents and Settings\Anantha Metta\Desktop\mw1.bmp", dssprite)

Dim SrcRect As RECT
Dim DestRect As RECT


With SrcRect
.Bottom = 200
.Left = 0
.Right = 200
.Top = 0
End With

With DestRect
.Bottom = 200
.Left = 0
.Right = 200
.Top = 0
End With

Dim ck As DDCOLORKEY
ck.low = RGB(255, 255, 255)
ck.high = RGB(255, 255, 255)
sprite.SetColorKey DDCKEY_SRCBLT, ck

BackBuffer.Blt DestRect, sprite, SrcRect, DDBLT_KEYSRC Or DDBLT_WAIT

Primary.Flip Nothing, DDFLIP_WAIT


End Sub

Private Sub Form_Click()
Unload Me
End Sub

Private Sub Form_Load()
Call Init
End Sub
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