RegDeleteKeyEx wie geht das ??

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Return Value

If the function succeeds, the return value is ERROR_SUCCESS.

If the function fails, the return value is a nonzero error code defined in Winerror.h. You can use the FormatMessage function with the FORMAT_MESSAGE_FROM_SYSTEM flag to get a generic description of the error.

Remarks

A deleted key is not removed until the last handle to it is closed.

On WOW64, 32-bit applications view a registry tree that is separate from the registry tree that 64-bit applications view. This function enables an application to delete an entry in the alternate registry view.

The subkey to be deleted must not have subkeys. To delete a key and all its subkeys, you need to enumerate the subkeys and delete them individually. To delete keys recursively, use the RegDeleteTree or SHDeleteKey function.

If the function succeeds, RegDeleteKeyEx removes the specified key from the registry. The entire key, including all of its values, is removed.