Check whether your application is running

Author: saabz_500 (talk, contrib)

Description

This example detects if the application you are uninstalling is running at the start of the uninstallation process.
The easiest way to find the "WindowClassOfYourApplication" and "WindowTitleOfYourApplication" is to use Microsoft Spy++. Spy++ is a tool that comes with Visual Studio.

The Example Script

/* Replace the values of the two defines below to your application's window class and window title, respectivelly. */
!define WNDCLASS "WindowClassOfYourApplication"
!define WNDTITLE "WindowTitleOfYourApplication"
 
Function un.onInit
  FindWindow $0 "${WNDCLASS}" "${WNDTITLE}"
  StrCmp $0 0 continueInstall
    MessageBox MB_ICONSTOP|MB_OK "The application you are trying to remove is running. Close it and try again."
    Abort
  continueInstall:
FunctionEnd

For any queries mail me at :saabz_500@yahoo.co.uk