Question

I use this function to find any installed application.

But the parameter “InstallLocation” doesn’t work at all.

Any clue?

Thanks!!

void FindApplication(string appName)
{
    StringBuilder sbProductCode = new StringBuilder(39);
    int iIdx = 0;
    while (0 == MsiEnumProducts(iIdx++, sbProductCode))
    {
        Int32 productNameLen = 512;
        StringBuilder sbProductName = new StringBuilder(productNameLen);

        MsiGetProductInfo(sbProductCode.ToString(), "ProductName", sbProductName, ref productNameLen);

        if (sbProductName.ToString().Contains(appName))
        {
             Int32 installDirLen = 2048;
             StringBuilder sbInstallDir = new StringBuilder(installDirLen);
             MsiGetProductInfo(sbProductCode.ToString(),"InstallLocation", sbInstallDir, ref installDirLen);

             string result = string.Format("ProductName {0}: {1}", sbProductName, sbInstallDir);
             }
       }
}

Answer 1

I’ve visited the following links, and they don’t appear to be outdated:

• MsiGetProductInfo function
• MsiGetProductInfoEx function

The only keys I see that can be used are these:

• ARPINSTALLLOCATION
• INSTALLDIR
• INSTALLPROPERTY_INSTALLLOCATION
• INSTALLLOCATION

I should point out that it appears MsiGetProductInfoEx (second link) should be used to gather information on published/installed products added by another user; and requires administrative privledges.