# Application functions

> VB Scripting functions for returning application error codes and uninstalling InstallShield-based applications.

Source: https://docs.capaone.com/capainstaller/vb-scripting-library/application-functions/  
Product: CapaInstaller — a separate CapaSystems product; do not apply this page to any other.

The Applications category contains various functions used to return error codes and to uninstall applications.

## In this section

- [Appl_ISMSapplInstalled](/capainstaller/vb-scripting-library/application-functions/appl-ismsapplinstalled/)
- [Appl_ISResultCode](/capainstaller/vb-scripting-library/application-functions/appl-isresultcode/)
- [Appl_SetMSIError](/capainstaller/vb-scripting-library/application-functions/appl-setmsierror/)
- [Appl_UninstallISAppl](/capainstaller/vb-scripting-library/application-functions/appl-uninstallisappl/)