Qt application icon looks fine on Windows Vista and 7, but not visible in Windows XP

Hello!

I know there have been questions related to setting application icon, but I couldn't find a solution to my problem.

I use Qt 4.6.3 on Windows 7 x64 to develop a small application for windows.

I have

Code:

---

RC_FILE = myapp.rc

---

in my .pro file, and

Code:

---

IDI_ICON1 ICON DISCARDABLE "myappicon.ico"
 
1 VERSIONINFO
FILEVERSION             1,0,1,0
PRODUCTVERSION          1,0,1,0
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "040904E4"
        BEGIN
            VALUE "CompanyName",      "My Company\0"
            VALUE "FileDescription",  "A simple desktop application.\0"
            VALUE "FileVersion",      "1.0.1\0"
            VALUE "LegalCopyright",   "Copyright 2010 My Company\0"
            VALUE "ProductName",      "MyApp\0"
            VALUE "ProductVersion",   "1.0.1\0"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x409, 1252
    END
END

---

in myapp.rc.

Everything works just fine on both Windows 7 and Windows Vista. The file information (product name, copyright etc.) and the .exe icon appear as I've set them. The problem is on Windows XP, where the .exe icon does not appear in Explorer, although the other information (product name, copyright) is ok. The application works fine, otherwise.

Any insight would be greatly appreciated.

Any thoughts?

You possibly have only the Vista/Win 7 256x256 PNG image in the ICO file and not the smaller, old-style images.

Chris, you were right. It would seem that I didn't pay enough attention when I created the .ico file, and it only contained the 256x256 pixels image. I recreated the .ico, adding all other available image sizes, and it now seems to work as expected on both windows 7 and XP.

Thanks, your help is much appreciated!