Ctl3d32.dll is mainly common for Windows NT and Windows 95. It also helps in compatibility issues of software that has to be ran on these previous versions of windows. One has to always make sure that they have the correct version otherwise the PC will start acting up. Also, you have to make sure that you are only running on one version of ctl3d32.dll otherwise the computer will once again refuse to work properly. The download below should be able to address all the problems that you might be having with the ctl3d32.dll. Click here for the ctl3d32.dll download.