diff --git a/macros/aggr_co_class/src/com_struct.rs b/macros/aggr_co_class/src/com_struct.rs
index 3d468d3..b75429a 100644
--- a/macros/aggr_co_class/src/com_struct.rs
+++ b/macros/aggr_co_class/src/com_struct.rs
@@ -14,36 +14,24 @@ pub fn generate(
     let struct_ident = &struct_item.ident;
     let vis = &struct_item.vis;
 
-    let bases_interface_idents = base_interface_idents.iter().map(|base| {
-        let field_ident = macro_utils::vptr_field_ident(&base);
-        quote!(#field_ident: <dyn #base as com::ComInterface>::VPtr)
-    });
+    let base_fields = co_class::com_struct::gen_base_fields(base_interface_idents);
+    let ref_count_field = co_class::com_struct::gen_ref_count_field();
+    let user_fields = co_class::com_struct::gen_user_fields(struct_item);
+    let aggregate_fields = co_class::com_struct::gen_aggregate_fields(aggr_map);    
 
-    let ref_count_ident = macro_utils::ref_count_ident();
     let non_delegating_iunknown_field_ident = macro_utils::non_delegating_iunknown_field_ident();
     let iunknown_to_use_field_ident = macro_utils::iunknown_to_use_field_ident();
 
-    let fields = match &struct_item.fields {
-        Fields::Named(f) => &f.named,
-        _ => panic!("Found non Named fields in struct."),
-    };
-
-    let aggregates = aggr_map.iter().map(|(aggr_field_ident, _)| {
-        quote!(
-            #aggr_field_ident: *mut <dyn com::IUnknown as com::ComInterface>::VPtr
-        )
-    });
-
     quote!(
         #[repr(C)]
         #vis struct #struct_ident {
-            #(#bases_interface_idents,)*
+            #base_fields
             #non_delegating_iunknown_field_ident: <dyn com::IUnknown as com::ComInterface>::VPtr,
             // Non-reference counted interface pointer to outer IUnknown.
             #iunknown_to_use_field_ident: *mut <dyn com::IUnknown as com::ComInterface>::VPtr,
-            #ref_count_ident: u32,
-            #(#aggregates,)*
-            #fields
+            #ref_count_field
+            #aggregate_fields
+            #user_fields
         }
     )
 }
diff --git a/macros/co_class/src/com_struct.rs b/macros/co_class/src/com_struct.rs
index 5e74bd2..4a7fa3b 100644
--- a/macros/co_class/src/com_struct.rs
+++ b/macros/co_class/src/com_struct.rs
@@ -18,31 +18,50 @@ pub fn generate(
     let struct_ident = &struct_item.ident;
     let vis = &struct_item.vis;
 
+    let base_fields = gen_base_fields(base_interface_idents);
+    let ref_count_field = gen_ref_count_field();
+    let user_fields = gen_user_fields(struct_item);
+    let aggregate_fields = gen_aggregate_fields(aggr_map);    
+
+    quote!(
+        #[repr(C)]
+        #vis struct #struct_ident {
+            #base_fields
+            #ref_count_field
+            #aggregate_fields
+            #user_fields
+        }
+    )
+}
+
+pub fn gen_base_fields(base_interface_idents: &[Ident]) -> HelperTokenStream {
     let bases_interface_idents = base_interface_idents.iter().map(|base| {
         let field_ident = macro_utils::vptr_field_ident(&base);
         quote!(#field_ident: <dyn #base as com::ComInterface>::VPtr)
     });
+    quote!(#(#bases_interface_idents,)*)
+}
 
+pub fn gen_ref_count_field() -> HelperTokenStream {
     let ref_count_ident = macro_utils::ref_count_ident();
+    quote!(#ref_count_ident: u32,)
+}
 
-    let fields = match &struct_item.fields {
-        Fields::Named(f) => &f.named,
-        _ => panic!("Found non Named fields in struct."),
-    };
-
+pub fn gen_aggregate_fields(aggr_map: &HashMap<Ident, Vec<Ident>>) -> HelperTokenStream {
     let aggregates = aggr_map.iter().map(|(aggr_field_ident, _)| {
         quote!(
             #aggr_field_ident: *mut <dyn com::IUnknown as com::ComInterface>::VPtr
         )
     });
 
-    quote!(
-        #[repr(C)]
-        #vis struct #struct_ident {
-            #(#bases_interface_idents,)*
-            #ref_count_ident: u32,
-            #(#aggregates,)*
-            #fields
-        }
-    )
+    quote!(#(#aggregates,)*)
+}
+
+pub fn gen_user_fields(struct_item: &ItemStruct) -> HelperTokenStream {
+    let fields = match &struct_item.fields {
+        Fields::Named(f) => &f.named,
+        _ => panic!("Found non Named fields in struct."),
+    };
+
+    quote!(#fields)
 }
diff --git a/macros/co_class/src/com_struct_impl.rs b/macros/co_class/src/com_struct_impl.rs
index 93f5615..a7575d6 100644
--- a/macros/co_class/src/com_struct_impl.rs
+++ b/macros/co_class/src/com_struct_impl.rs
@@ -46,7 +46,9 @@ pub fn gen_allocate_fn(
     quote!(
         fn allocate(#allocate_parameters) -> Box<#struct_ident> {
             println!("Allocating new VTable for {}", stringify!(#struct_ident));
+
             #base_inits
+            
             let out = #struct_ident {
                 #base_fields
                 #ref_count_field
diff --git a/macros/co_class/src/lib.rs b/macros/co_class/src/lib.rs
index a134d5a..dd22f44 100644
--- a/macros/co_class/src/lib.rs
+++ b/macros/co_class/src/lib.rs
@@ -5,9 +5,9 @@ use syn::{AttributeArgs, ItemStruct};
 use std::iter::FromIterator;
 
 pub mod class_factory;
-mod com_struct;
+pub mod com_struct;
 pub mod com_struct_impl;
-mod drop_impl;
+pub mod drop_impl;
 pub mod iunknown_impl;
 
 // Macro expansion entry point.