HRESULT is a 32-bit value, divided into three different fields: a severity code, a facility code, and an error code.
HRESULT为32位元值，它划分为三个不同栏位：严重性代码、设备代码和错误码。
The severity code indicates whether the return value represents information, warning, or error.
严重性代码指示返回值是表示信息、警告还是错误。
The severity code indicates whether the return value represents information, warning, or error.
严重性代码指示返回值是表示信息、警告还是错误。
应用推荐