Question

Is it possible to get office 2010 bitness using getBinaryType() function which is defined in kernel32.dll something like this.

[DllImport("kernel32.dll")]
static extern bool GetBinaryType(string lpApplicationName, out uint lpBinaryType);

uint type;
GetBinaryType("applicationName",out type);

I have tried using application class as stated below but sometimes it will fail.

 public static ExcelVersion GetExcelVersion(object applicationClass)
        {
            if (applicationClass == null)
                throw new ArgumentNullException("applicationClass");

            PropertyInfo property = applicationClass.GetType().GetProperty("HinstancePtr", BindingFlags.Instance | BindingFlags.Public);
            if (property == null)
                return ExcelVersion.Excel;

            return (System.Runtime.InteropServices.Marshal.SizeOf(property.GetValue(applicationClass, null)) == 8) ? ExcelVersion.Excel2010_64 : ExcelVersion.Excel2010_32;
}

Is there any another way to detect office 2010 bitness?

Answer 1

What I would do is

1) open the following registry key:

HKEY_CLASSES_ROOT\CLSID\{00024500-0000-0000-C000-000000000046}\LocalServer

(the guid means “Excel Application”)

2) extract Excel’s .EXE path from the key’s default value (you want to remove all command line arguments)

3) use GetBinaryType on the path.