ICategory::AddProduct
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Use this method to add the specified product to this category.
Definition
HRESULT ICategory::AddProduct(VARIANTvarProductID);
Parameters
varProductID
[in] A VARIANT that contains the of the product to be added.
Return Values
This method returns an HRESULT indicating whether it completed successfully. See the Error Values section for more details.
Error Values
This method returns S_OK (0x00000000) to indicate success and either standard or custom COM HRESULT error values to indicate failure. For more information about standard COM errors, see Standard COM Errors.
The following table shows the custom COM errors that this method can return.
| Constant | Value | Description |
| E_CAT_PRODUCT_DOESNT_EXIST | 0x8898001E | The specified product did not exist in the catalog. |
| E_CAT_PRODUCT_ALREADY_ADDED | 0x88980029 | The specified product was already in this category. |
Additional information may be available using the global Err object, which can be accessed using the API function GetErrorInfo. In particular, the GetDescription method of the IErrorInfo interface may return a text description of the error.
Remarks
A product may exist in multiple categories simultaneously, without limit.
For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.