Using bitblt API on DXDrawSurface7

[BodwadUK]

Hello people. I am trying to copy an image from a picture box onto a directdrawsurface7. For some reason the bitblt API just wont do its job. Every example I have seen on the web seems to be the same

    'Create The Image
    DDSD.lFlags = DDSD_CAPS + DDSD_HEIGHT + DDSD_WIDTH
    DDSD.ddsCaps.lCaps = DDSCAPS_3DDEVICE
    DDSD.lWidth = DXRect.Right - DXRect.Left
    DDSD.lHeight = DXRect.Bottom - DXRect.Top
    
    Set DXSurface = DDraw.CreateSurface(DDSD)
    SurfaceDC = DXSurface.GetDC
    Debug.Print BitBlt(SurfaceDC, 1, 1, DDSD.lWidth, DDSD.lHeight, PBBox.Image, DXRect.Left + 1, DXRect.Top + 1, vbSrcCopy)
    DXSurface.ReleaseDC SurfaceDC

Anybody got any advice as to why it wont be working?

[Milk]

Not sure about BitBlting to a directdrawsurface7, but I am familiar with BitBlt.
BitBlt requires a hDC for both the source and destination, your using a Bitmap handle for the source, try this

Debug.Print BitBlt(SurfaceDC, 1, 1, DDSD.lWidth, DDSD.lHeight, PBBox.hDC, DXRect.Left + 1, DXRect.Top + 1, vbSrcCopy)

BitBlt also does not invoke a refresh so normally you have to also refresh the target to see the result, I don't now how that would apply to a directdrawsurface7.

[BodwadUK]

No sorry that didnt work either. Thanks for the help though

[Milk]

Did you refresh? What code did BitBlt return?
If it was non zero, BitBlt was successful, at least it thinks it was.

[BodwadUK]

Oh it always returns 0. I thought that meant success S

I dont think there is a refresh in DX.

[BodwadUK]

Hmmm it does work but its returning some weird image as though its off my screen. Its a block from the center of my screen not the picturebox S

[Milk]

Ahh, set the source pictureboxes autoredraw property to true. If false the picturebox does not have it's own DC, and BitBlt will copy a portion of the desktop instead.

[BodwadUK]

Found it. The hdc is what I need but the picturebox HAS TO HAVE AUTOREFRESH ON. Otherwise it copies the image behind the picturebox

Thanks for your help. Wouldnt have got anywhere if I didnt know the hdc and the fact that bitblit returns non zero as a success