seejayou
17th December 2002 18:07 UTC

Preinstall check
  Hi,

I am wanting to check the version of Java Runtime installed before I allow my application to install. I want it to be a minimum of 1.4

Function .onInit
ReadRegStr $R0 HKLM "SOFTWARE\JavaSoft\Java Runtime Environment\CurrentVersion" CurrentVersion
StrCmp $R0 "1.4" NoAbort 0
MessageBox MB_OK "JRE not high enough"
Abort ; causes installer to quit.
NoAbort:
FunctionEnd

The above is what I currently have but this doesn't appear to work. I would really like to convert the $R0 to an int so I can use the IntCmpU and use the if greater than check as well rather than having to change the code everytime that a new JRE is released.

Any help much appreciated.

C.

rarefluid
17th December 2002 20:27 UTC

Try this :
The CurrentVersion is a Value, not a key, so you have to state the name seperate... ;-)

onInit

StrCpy $R9"14" ;add java version here or define it somewhere...

>ReadRegStr $R0 HKLM "SOFTWARE\JavaSoft\Java Runtime Environment" "CurrentVersion"

>StrCpy $R1 $R0 1    ;get first number

StrCpy $R2 $R0"" 2 ;get rest of number

StrCpy $R1"$R1$R2" ;concate version numbers

IntCmp $R1 $R9 version_ok"" version_ok

StrCpy $R1 $R1 1   ;get first number again

StrCpy $R3 $R9 1   ;get first number of needed version

StrCpy $R4 $R9"" 1 ;get rest of needed version

MessageBox MB_OK "JRE not high enough.$\r$\nYou have version $R1.$R2$\r$\nVersion $R3.$R4 is needed" 

>Abort ; causes installer to quit. 

>version_ok:

>FunctionEnd 

>

seejayou
17th December 2002 21:33 UTC

Thanks, Got it all working...once I took the quotes off from CurrentVersion.

Thanks for you help.

C.