Hi My Application use Microsoft JavaVM,and my installation must decide installing the JavaVM or not(JavaVM has installed by other application already).So, could you tell me how could I make this decision.
Perhaps there's a registry key whose existence indicates a certain JVM is present? If you look at the JRE prerequisite in InstallShield, you might get some hints...
For the latest Sun JVMs' they are now installed side-by-side. Each verion registers itself in the following key
[HKLM\Software\JavaSoft\Java Runtime Environment]
There is a key for each version of the JVM installed, so you could determine whether the version you require is already installed using this (and installed your required version as necessary)
