问题
Unable to cast COM object of type 'Microsoft.Office.Interop.PowerPoint.ApplicationClass' to interface type 'Microsoft.Office.Interop.PowerPoint._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{91493442-5A91-11CF-8700-00AA0060263B}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)).
I am unable to finding solution please any one help in this?
来源：https://stackoverflow.com/questions/30728734/unable-to-cast-com-object-of-type-microsoft-office-interop-powerpoint-applicati