Hi everybody,
we use the PictureBox Control with VB5 to extensivly create dynamical images
and copy the images to a grid control. Multiple drawing/resizing the same
PictureBox results in 'out of GDI memory resources' error messages. What
alternative control we could use instead?

Any suggestions are welcome!

Torsten

Can't be sure it's the same problem that you're experiencing, but there is a
known problem of losing resources when accessing the "image" property of a
picturebox control under Win95. See Microsoft knowledge-base article Q174825
or this hyperlink:

http://support.microsoft.com/support/kb/articles/q174/8/25.asp

The article suggests a workaround (use the BITBLT API) which didn't really
meet my needs, but maybe it will work for you.

Good luck!

Have you installed any service packs?  SP2, especially, fixed a lot of
miscellaneous resource leaks.

Jim Deutch
MS Dev MVP

I believe this problem has been fixed in SP2: anyway, I just ran the
example and got no resource leak.

Jim Deutch
MS Dev MVP

I have VB5 SP3, and the bug is still here, but only with metafiles.
There is the same problem with Forms and Images.

Andrea Dazzi.

I've reproduced this, somewhat, with the following code.  I placed a
picturebox, set to AutoRedraw = True, an ImageList, and a button on a
form and put this code in the button click event:

Private Sub Command1_Click()
    Dim i As Long

    'loses about 4% GDI memory each click
    For i = 1 To 50
        Picture1.Cls   'leaks
        'Picture1.Picture = LoadPicture()   'leaks
        'Picture1.Line (0, 0)-Step(Picture1.ScaleWidth,
Picture1.ScaleHeight), Picture1.BackColor, BF  'no leak!
        Picture1.Line (Rnd * 100, Rnd * 100)-Step(Rnd * 700, Rnd * 700), 0&
        ImageList1.ListImages.Add , , Picture1.Image
    Next i
End Sub

Resizing the picturebox does not seem to affect the results.

The problem is in the .Cls: simply drawing a filled box in the
backcolor over the whole picturebox instead of clearing it cures the
resource leak.  I did this in Win95, VB5 SP2, HighColor (16-bit) video.

Jim Deutch
MS Dev MVP