checking if a program is installed

Hi all,

I've written this program in VB6 using ADO. I don't like the VS Package and Deployment Wizard, so I wrote my own installer - and now I have a problem.

My installer will only install the exe and the database, and register the required dlls and OCXs. I need to check if the user has ADO support on his machine, and if no, run the installer for Data Access Components - and check again for successful install before continuing with my program install.

How do I do this? Prompting the user to run the installer for DAC doesn't seem professional, and I don't want to go back to P&D Wizard.

Thanks in advance...