Recently, a friend asked Bian Xiao that there was an error in compiling the vsto program, prompting "Signature error: the specified provider type is invalid". What's going on here? I believe that friends who often write vsto programs should have encountered this kind of error, but do you know how to solve this problem? What happens if an invalid provider type is specified? Don't worry, let Bian Xiao take you to learn the solution of specifying an invalid provider type today.

Invalid provider type resolution specified:

1. Go to the root directory of the office installation, find the SELFCERT.EXE program, and run it to generate a custom certificate.

2. In the project properties, set the signature. Click Select from Storage Area and select the custom certificate generated in the previous step.

Well, this is what you should do when you specify an invalid provider type. I hope this article is helpful to you.