Need assistance deploying native (c++) Outlook add-in - outlook

Question

I'm looking for Outlook 2007+ add-in deployment assistance. To deploy on a Win7 x64 and Office 2013 x64 machine, I added the registry keys from my Visual Studio 2013 native COM Outlook add-in project (.rgs file) and then copied the add-in library to the add-in directory on the client machine. Outlook is not loading the add-in on launch. Trying to load the library manually using the COM add-in dialog invokes an error ' like c:\Users\505hpc6z06\appdata\Roaming\Microsoft\AddIns\MyAddin.dll is not a valid Office add-in'.
These are the registry keys I added (not in wow64 registry node). In place of %MODULE% , I put the absolute path of the MyAddin.dll. something like c:\Users\505hpc6z06\appdata\Roaming\Microsoft\AddIns\MyAddin.dll
HKCR
{
NoRemove CLSID
{
ForceRemove {EB824C19-380D-417E-A9E2-28E77B2F3026} = s 'CompReg Class'
{
InprocServer32 = s '%MODULE%'
{
val ThreadingModel = s 'Apartment'
}
TypeLib = s '{B0A51D8E-5E5A-447B-B935-765F3BC5C79F}'
Version = s '1.0'
}
}
}
HKCU
{
NoRemove Software
{
NoRemove Microsoft
{
NoRemove Office
{
NoRemove Outlook
{
NoRemove Addins
{
FromCloud.Connect
{
val Description = s 'My Outlook Addin'
val LoadBehavior = d 3
}
}
}
}
}
}
}
This is not a VSTO or .NET project/add-in. How can I deploy a native COM Outlook add-in to a client machine (win7, win8, win10, Outlook 2007+)?

Answer 1

Your unmanaged (c++) add-in needs to be compiled as 64-bit to be usable in Office 64-bit. Simply speaking, a 64-bit program cannot use 32-bit dll.
Does not matter what you write to the rigistry, 64-bit outlook will not load 32-bit COM addin. See similar question here: Using 32bit COM addin under MS Office 64 bit