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How display a PNG picture  using VB5 Image object - need complete code - novice

Posted on 2008-06-13
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Last Modified: 2011-10-19
I like display pictures in image vb5 control .
jpg anfd gif are supported without problem.
How display also PNG pictures?
Please, complete code because I'm novice in vb programming.
I include example to finish/modify.

THE FILE UPLOADER BLOCKED ME SOME EXTENSIONS.
To use it rename the files:
form1frm form1.frm
form1frx form1.frx
progetto1vbp progetto1.vbp
progetto1vbw progetto1.vbw


test-png.zip
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Question by:antares2001
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Expert Comment

by:danaseaman
ID: 21778050
Vb Image and PictureBox contros do not support PNG.
Download this free control that supports PNG:
http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=68262&lngWId=1 
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by:antares2001
ID: 21778159
This is very nice but more complicated example. I'm looking for simple way , to exchange image control with png supportable control.
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Expert Comment

by:danaseaman
ID: 21781743
The reason AlphaImage Control is complicated is that it supports 32-bit alpha images(Png, Bmp, Ico), Gif and will work on OS Win98 or later even if you do not have GDI+ installed.

If all you want is Png support, this can be done easily with GDI+ which limits you to XP or later(unless you install GDI+ on Win98). You will need at minimum a PropertyPage, UserControl, and a GDI+ support module. Not really something you could put together in a few minutes. It would probably take several hours.
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Author Comment

by:antares2001
ID: 21785552
I have to do it on visual basic 5 to modify an old software that work fine on w98 2000 xp etc

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Expert Comment

by:danaseaman
ID: 21785607
aicAlphaImage includes a folder "Usercontrol Only". Run "AlphaImageControl.vbp" and it will create an OCX. Then go to Project/AlphaImageControl Properties/Component and set Binary compatibility = True and point to the OCX you just compiled. This ensures that you have a unique GUID for this control.

Add the OCX to your project via Project/Components and the control should appear in the ToolBox.

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Author Comment

by:antares2001
ID: 21791108
I try, but where can I download aicAlphaImage and AlphaImageControl.vbp ?
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Expert Comment

by:danaseaman
ID: 21792816
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by:antares2001
ID: 21803459
I have compiled ocx control and add to my own project.
I can view PNG images, but only in iteractive mode (open file -browse ...etc)
I need have a control property to view images from program running, and not in interactive mode, that is same as use internet explorer.
Sorry, this is not my soluction.
:(
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Accepted Solution

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danaseaman earned 500 total points
ID: 21804057
At runtime you can load images from File, Resource, Array, Clipboard, Handle, or StdPicture:
Option Explicit
 
Private Sub Form_Load()
   aicAlphaImage1.LoadImage_FromFile (App.Path & "\firefox3.png")
   'aicAlphaImage1.LoadImage_FromResource VB.Global, "Custom", "LaVolpe"
End Sub

Open in new window

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Author Comment

by:antares2001
ID: 21853557
Fine!
I'm incoming to pay points to danaseaman.
Only another dubt: the compiled AlphaImageControl.ocx is free or have to be purchased or paid or licensed or is trialware and expire....... ?

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Author Closing Comment

by:antares2001
ID: 31466878
Thank you, now is all clear. Regards
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Expert Comment

by:danaseaman
ID: 21861852
AlphaImageControl.ocx is free.
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Author Comment

by:antares2001
ID: 21863017
Hi, thank you for all.
If you want, you can contact me directly by form http://www.realmeteo.com/contact_form.asp , so I have an extra gift for you (if you like it).
Luciano P.
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Author Comment

by:antares2001
ID: 21863620
Hi,
I speak about AlphaImageControl.ocx with a VB Guru....
Is strange that it include ZLIB.DLL ..... (more emplojed for build spyware and malware)!?
Is real?
What about?
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Expert Comment

by:danaseaman
ID: 21864396
Zlib is included so that you do not need to install GDI+ on Win9x systems. It contains compression and decompression functions. Zlib is not Spyware or Malware. See http://www.zlib.net/ 
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Author Comment

by:antares2001
ID: 21864430
Thank, I see for it.

In any case I have open a new question about, and if you want 125 extra points go on
http://www.experts-exchange.com/Programming/Languages/Visual_Basic/Q_23514048.html

bye
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Author Comment

by:antares2001
ID: 21864547
I have a remark.
DLL included in OCX is ZLIB1.DLL and not ZLIB.DLL

What is ZLIB1 ??
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Expert Comment

by:danaseaman
ID: 21864601
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