Icons for file extension

[avcaballero]

Hello I have asociated some extensions to the same basic text file editor. I have realized that when I do that, those file extensions are agroupated automatically, so, when I try to change the icon to any of them, all of them are changed, in that way that I can not stablish the icon I want for the correspond file.

The file extensions are asm, bas, c, c++, h, sql

The programs I have used to change the icon file:
  - Default Programs Editor
  - FileTypesMan
 
I have made the icon files by hand and embeded all in "prgs.dll", that attach, with the program ResourceHacker.

When I change the icon for "*.asm" with "asm.ico", for example, all asm-bas-c-c++-h-sql icon files are changed to "asm.ico".

Any idea of how to do that?

Thank you

[HSE]

Hi caballero!

What you see is the icon of the application asociated with that extensions.

You don't change the icon for "*.asm", you change the icon of the asociation. 

HSE

[avcaballero]

Hello

However, there are applications that associate different icons to different types of extensions. For example PlanMaker, an excel alike, "pmdx" has a different icon than "xlsx". Some text editor set different icons for different extensions. Ultraedit did it, if I'm not wrong.

[HSE]

However, there are applications that associate different icons to different types of extensions.

Also there some applications that can do that, but I have no references :FileTypesMan.

No explanation how that work.

[avcaballero]

> FileTypesMan

Yes, as I said in the first post, that is one of the applications that I have used to try to do it. The problem is that when you change the icon of an extension opened by a text editor, it changes the icons of all other extensions associated with this editor.

[HSE]

Apparently the file extension have to include a"persistent handler" code in register. And also a subtype (I'm inventing the name) declaration of the application instead of "auto_file".

In the "subtype" of application you can declare the icon. All this is in HKEY_CLASSES_ROOT.

I will try later.