PowerPoint Shapes.AddOLEObject Throws Error HRESULT E_FAIL
问题 Following the guidelines from this link, I've wrapped a user control as an ActiveX component. Build the code successfully, and I can confirm that the COM component is registered in Windows registry. Class name mentioned in registry is "MyChartsControl.UserControl1". After that I try to add my ActiveX Wrapped user control in PowerPoint Slide object using following code: powerpointSlideObject.Shapes.AddOLEObject(100, 100, 111, 222, ClassName:="MeridiaChartsControl.UserControl1") OR using the