Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Transparent  and treeview

Posted on 2001-07-05
Last Modified: 2008-02-01
Hi EEs:

This is the scenario:

I have a treeview and imagelist controls.
Imagelist is loaded with transparent gifs images.

Why those images haven't transparent background when are seeing on treeview?


Question by:Richie_Simonetti

Accepted Solution

TheRedGuy earned 50 total points
ID: 6258888
Dunno, can you not just convert the gifs to icons?

Expert Comment

ID: 6259000
You have to set the ImageList's MaskColor property to the color in your GIF images you want to see as "transparent" when used on the TreeView. It won't take the transparency settings of the GIF files.


Expert Comment

ID: 6259014
What colour is the background when they are in the TreeView ?

If it always the same then in your image list control
in the Color tab change the mask color to the color of the background.

Hope this helps
Active Directory Webinar

We all know we need to protect and secure our privileges, but where to start? Join Experts Exchange and ManageEngine on Tuesday, April 11, 2017 10:00 AM PDT to learn how to track and secure privileged users in Active Directory.


Expert Comment

ID: 6259086
In your ImageList load the gif images and set the mask color to the background color that it appears as in the imagelist (usually black). Make sure the UseMaskColor option is checked.

The pictures should now appear as transparent in your TreeView.

LVL 16

Author Comment

ID: 6259462
Well, i already tried Usemaskcolor property without solve the problem.
VincentLawlor, i would reject your answer until i have received more input from others EE.

At the momment of posting question, i had this:
All Gif background are &HFF00FF (Nice color, isn't it?) and all are 256 color depth, loaded to imagelist at design time.
Maskcolor = &HFF00FF

By the way, i am working with those controls from within VBA.

Thanks for yours comments, i am waiting...
LVL 16

Author Comment

ID: 6259838
TheRedGuy, your comment is close enought.
I would like to know why it doesn't works with gif.
LVL 16

Author Comment

ID: 6261579
I don't like to use BMPs simbce they are so heavy. I was using gif instead for that reason.
Ico files are less weight than BMP and it works.
TheRedGuy you have the answer. Thanks

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When designing a form there are several BorderStyles to choose from, all of which can be classified as either 'Fixed' or 'Sizable' and I'd guess that 'Fixed Single' or one of the other fixed types is the most popular choice. I assume it's the most p…
Enums (shorthand for ‘enumerations’) are not often used by programmers but they can be quite valuable when they are.  What are they? An Enum is just a type of variable like a string or an Integer, but in this case one that you create that contains…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question