ICategory::AddChildCategory
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Use this method to add a category as a child to this category.
Definition
HRESULT ICategory::AddChildCategory(BSTRstrCategoryName);
Parameters
strCategoryName
[in] A BSTR that contains the name of the category to be added as a child to this category.
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_CATEGORY_ALREADY_ADDED | 0x8898002D | The specified category has already been added as child to this category. |
| E_CAT_CATEGORY_DOESNT_EXIST | 0x8898001C | The specified category did not exist. |
| E_CAT_INVALID_CHILDCATEGORY | 0x8898005D | The category that you specified already exists as a parent of this category. |
| E_CAT_INVALID_RELATION | 0x88980039 | A category cannot be a parent or child of itself. |
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
For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.