Could not refresh the Tree View of Windows Explorer

[shinichi81]

Could anyone help me?
After updating icon for a drive, for example C drive by specifying icon file at HKEY_LOCAL_MACH INE\SOFTWARE\Mi crosoft\Windows \CurrentVersion \Explorer\Drive Icons\C\Default Icon, I want to refresh at Windows Explorer and below is processing flow:
- Read a metrics value, for example "Shell Icon Size" at HKEY_CURRENT_US ER\Control Panel\Desktop\W indowMetrics
- Decrease icon size by 1
- SendMessage(HWN D_BROADCAST, WM_COMMAND, 106597, 0);
- Increase icon size by 1 (back to original value)
- SendMessage(HWN D_BROADCAST, WM_COMMAND, 106597, 0);

I checked on both Win2K & XP, below is result:
- On Win2K, icon of C drive is updated on both List view & Tree view (right & left panels of Windows Explorer)
- On WinXP, icon of C drive is updated only on List view & Tree view (right panel of Windows Explorer). How to solve this problem?

Many thanks,

[shinichi81]

There is 1 more important point:
- I select "My Computer" and collapse it (to hide C drive) then perform refreshing (as my previous post). After that, expand "My Computer" again, the icon is updated (of-couse I mean on WinXP).

Please help me!

[DeMan]

I'm not sure I quite follow, do you mean you press F5 to refresh and then get an error?

[shinichi81]

Thanks DeMan for your reply.
I could solve this problem now. I used SendMessageTime out(HWND_BROADC AST, WM_SETTINGCHANG E...) instead of sending WM_COMMAND. By using this, drive icons will be updated on both tree view & list view.

[shinichi81]

Sorry for a bit further question.

Now in 32bit environment, If I update icon information, for example:
- Key: HKEY_LOCAL_MACH INE\SOFTWARE\Mi crosoft\Windows \CurrentVersion \Explorer\Drive Icons\C\Default Icon
- Set default value = C:\Windows\Syst em32\Shell32.dl l,12

the icon of C drive will be changed.
Now I want to support this feature on 64bit environment. I dont know if I update above key, the drive icon will be updated or not (event WOW64 will update another key actually). If you know, please help me about this (sorry because I dont have any 64bit environment simulator).

Many thanks for your help!